Brith HaKehuna
Encyclopedia
The priestly covenant is a Hebrew Bible
Hebrew Bible
The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

 and chazal
Chazal
Chazal or Ḥazal is an acronym for the Hebrew "Ḥakhameinu Zikhronam Liv'rakha",...

ic term used to describe the general and specific attributes of the eternal covenant that God gave to Aaron
Aaron
In the Hebrew Bible and the Qur'an, Aaron : Ααρών ), who is often called "'Aaron the Priest"' and once Aaron the Levite , was the older brother of Moses, and a prophet of God. He represented the priestly functions of his tribe, becoming the first High Priest of the Israelites...

 and his descendants the Aaronic priesthood
Aaronic Priesthood
The Aaronic priesthood is the lesser of the two orders of priesthood recognized in the Latter Day Saint movement. The others are the Melchizedek priesthood and the rarely recognized Patriarchal priesthood...

 as found in the Hebrew Bible
Hebrew Bible
The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

 and Oral
Oral Torah
The Oral Torah comprises the legal and interpretative traditions that, according to tradition, were transmitted orally from Mount Sinai, and were not written in the Torah...

 Torah.

The covenant is portrayed as everlasting and Halachically applicable notwithstanding the removal of the "five articles of honor" (see Jerusalem Talmud
Jerusalem Talmud
The Jerusalem Talmud, talmud meaning "instruction", "learning", , is a collection of Rabbinic notes on the 2nd-century Mishnah which was compiled in the Land of Israel during the 4th-5th century. The voluminous text is also known as the Palestinian Talmud or Talmud de-Eretz Yisrael...

 to Sotah 35b for the complete list) prior to the destruction of the First Temple, and most priestly duties, including Korban
Korban
The term offering as found in the Hebrew Bible in relation to the worship of Ancient Israel is mainly represented by the Hebrew noun korban whether for an animal or other offering...

 offerings- with the destruction of the Destruction of the Second Temple.

In the Torah, the covenant is cited repeatedly as being compared to salt and is called "a covenant of salt forever" (Hebrew brith melach lam ברית מלח עולם), or "a statute forever" (Hebrew chukat olam" Midrash
Midrash
The Hebrew term Midrash is a homiletic method of biblical exegesis. The term also refers to the whole compilation of homiletic teachings on the Bible....

ic sources the priestly covenant as being one of five everlasting covenants

Priests in Genesis

The first person listed in the Hebrew Bible
Hebrew Bible
The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

 as a "priest" (Hebrew kohen) is Melchizedek
Melchizedek
Melchizedek or Malki Tzedek translated as "my king righteous") is a king and priest mentioned during the Abram narrative in the 14th chapter of the Book of Genesis....

. Midrashic literature details that due to Melchizedek preceding the name of Abraham to God, the priesthood was taken from him and given to Abraham who passed it on to his son Isaac
Isaac
Isaac as described in the Hebrew Bible, was the only son Abraham had with his wife Sarah, and was the father of Jacob and Esau. Isaac was one of the three patriarchs of the Israelites...

 who in turn passed it on to his son Jacob.

Jacob's deathbed blessing of Levi

Maimonides
Maimonides
Moses ben-Maimon, called Maimonides and also known as Mūsā ibn Maymūn in Arabic, or Rambam , was a preeminent medieval Jewish philosopher and one of the greatest Torah scholars and physicians of the Middle Ages...

, in his Mishna Torah compilation, explains that Jacob
Jacob
Jacob "heel" or "leg-puller"), also later known as Israel , as described in the Hebrew Bible, the Talmud, the New Testament and the Qur'an was the third patriarch of the Hebrew people with whom God made a covenant, and ancestor of the tribes of Israel, which were named after his descendants.In the...

 separated his son Levi
Levi
Levi/Levy was, according to the Book of Genesis, the third son of Jacob and Leah, and the founder of the Israelite Tribe of Levi ; however Peake's commentary suggests this as postdiction, an eponymous metaphor providing an aetiology of the connectedness of the tribe to others in the Israelite...

 from his other sons and appointed him to instruct and teach the ways of service to God, specifically the methods used by his forefather Abraham
Abraham
Abraham , whose birth name was Abram, is the eponym of the Abrahamic religions, among which are Judaism, Christianity and Islam...

, to his brothers. He also instructed his sons to perpetuate this status of the tribe of Levi for eternity (Maimonides, On Idolatry 1:15). For the prelude of this choice see Targum Jonathan
Targum Jonathan
Targum Jonathan - otherwise referred to as Targum Yonasan/Yonatan is the official eastern targum to the Nevi'im. Its early origins, however, are western i.e. from the Land of Israel, and the Talmudic tradition attributes its authorship to Jonathan ben Uzziel...

 to Genesis 32:25, and Pirkei de-Rabbi Eliezer ch. 37. In midrash it is written that Amram
Amram
In the Book of Exodus, Amram Arabic عمران Imran, is the father of Aaron, Moses, and Miriam and the husband of Jochebed.-In the Bible:In addition to being married to Jochebed, Amram is also described in the Bible as having been related to Jochebed prior to the marriage, although the exact...

 the son of Kohath
Kohath
According to the Torah, Kohath was one of the sons of Levi, and the patriarchal founder of the Kohathites, one of the four main divisions among the Levites in Biblical times; in some apocryphal texts such as the Testament of Levi, and the Book of Jubilees, Levi's wife, Kohath's mother, is named as...

 the son of Levi was the spiritual leader of the sons of Jacob during their Egyptian Bonadage. Following his death, his post was assumed by his firstborn Aaron.

Exodus

Aaron, as the leader of spiritual guidance of the children of Israel during their oppression in Egypt, and after the coming of his brother Moses and the exodus, was known by the people as a instructor of the Law, a man of exceptional kindness
Kindness
Kindness is the act or the state of being kind, being marked by good and charitable behaviour, pleasant disposition, and concern for others. It is known as a virtue, and recognized as a value in many cultures and religions ....

, and as a peacemaker and instiller amongst quarrelers.

At the time of the erection of the Tabernacle
Tabernacle
The Tabernacle , according to the Hebrew Torah/Old Testament, was the portable dwelling place for the divine presence from the time of the Exodus from Egypt through the conquering of the land of Canaan. Built to specifications revealed by God to Moses at Mount Sinai, it accompanied the Israelites...

, God commanded Moses to appoint Ahron and his sons to the priestly service as a precondition to God revealing his shechinah glory amongst the nation of Israel;
With the appearance that Aaron -by his own right- was worthy of the privilege of priesthood, the midrash clarifies that in fact it was due to the support and guidance of Moshe that afforded him the necessary qualifications for the Kohanic duties.

The priestly duties prior to Aaron

Prior to the appointing of Aaron and his sons to function as priests it was customary amongst the congregation of Israel that, just as all professions attract certain character types who excel therein, the duty of priesthood was best served by the firstborn of each household. As it is the firstborn who is, by nature, inclined and qualified to be an "emissary of the congregation" in the eyes of God. According the Targum Yosef to Books of Chronicles
Books of Chronicles
The Books of Chronicles are part of the Hebrew Bible. In the Masoretic Text, it appears as the first or last book of the Ketuvim . Chronicles largely parallels the Davidic narratives in the Books of Samuel and the Books of Kings...

, individuals from the Tribe of Reuben
Reuben
- General :* Reuben ** Tribe of Reuben an ancient tribe of Israel, said to be descended from the above* Reuben sandwich* Reuben , a British rock band* Reuben , a character in Lilo & Stitch: The Series* Reubens, Idaho...

 (the firstborn of Jacob) where leading as the High priest
Kohen Gadol
The High Priest was the chief religious official of Israelite religion and of classical Judaism from the rise of the Israelite nation until the destruction of the Second Temple of Jerusalem...

, up until the establishment of Aaron to the same (Targum Joseph to Books of Chronicles 1 5:1-2).

The Golden Calf, and sin of the firstborn

Based on Hebrew Bible narrative, the consequence of the sin of the golden calf
Golden calf
According to the Hebrew Bible, the golden calf was an idol made by Aaron to satisfy the Israelites during Moses' absence, when he went up to Mount Sinai...

 was the desire by God to annihilate the entire congregation. It was due to the successful prayer of Moses and the retribution meted out by the tribe of Levi from the inciters of the sin that appeased the anger of God. Obadiah ben Jacob Sforno
Obadiah ben Jacob Sforno
Obadiah ben Jacob Sforno was an Italian rabbi, Biblical commentator, philosopher and physician. He was born at Cesena about 1475 and died at Bologna in 1550....

 on Deuteronomy 10:8 writes that Moses attempted to convince God that the priesthood should remain with the firstborn but was not successful.

However, the negative consequence of arousing God's anger was that no longer would the priestly service be maintained by the firstborn of each individual family. As quoted by the Jerusalemn Talmud Yerushalmi to Esther 1:11; "Said Rabbi Levi, "God broke the staff of evildoers (Isaiah 14)" - these are the firstborn who sacrificed to the Calf first (and foremost)", but will be concentrated in one family as a form of inheritance from father to son.

According to Nahmanides
Nahmanides
Nahmanides, also known as Rabbi Moses ben Naḥman Girondi, Bonastruc ça Porta and by his acronym Ramban, , was a leading medieval Jewish scholar, Catalan rabbi, philosopher, physician, kabbalist, and biblical commentator.-Name:"Nahmanides" is a Greek-influenced formation meaning "son of Naḥman"...

 and other Torah commentators, the decision to appoint Aaron and his sons to priestly duty was a unilateral act of God, without the agreement or disagreement being asked of the congregation.

This decision was not readily accepted by the large majority of the congregation of Israel, and quickly enough began the rebellion led by Korah
Korach (parsha)
Korach or Korah is the 38th weekly Torah portion in the annual Jewish cycle of Torah reading and the fifth in the book of Numbers...

 and followed by the leaders of the tribe of Reuben
Tribe of Reuben
According to the Hebrew Bible, the Tribe of Reuben was one of the Tribes of Israel.From after the conquest of the land by Joshua until the formation of the first Kingdom of Israel in c. 1050 BC, the Tribe of Reuben was a part of a loose confederation of Israelite tribes. No central government...

. Indeed, so powerful was the rebellion that even after the divine punishment of Korah and his followers, other came forth who further demonstrated disagreement and likewise met with divine retribution until saved by Aaron himself, who arrested the plague.

Shlomo Ephraim Luntschitz
Shlomo Ephraim Luntschitz
Shlomo Ephraim ben Aaron Luntschitz was a rabbi, poet and Torah commentator, best known for his Torah commentary Keli Yakar.-Biography:...

 writes that the priesthood was taken from Reuben due to his sinning against his father Jacob.

Based on the Talmudic rule that "God and heaven give goodness but do not retract it once given" (Zohar Chadash to Ruth) it is explained that the priesthood was never bestowed by God and Heaven to the Bechorim but it was the decision of man to appoint the firstborn to those duties, it is thus applicable that God himself could choose who amongst his creatures are most fitting in his eyes for the priestly service.

The firstborn (bechorim) retain their sanctity

Albeit the sin of idolatry (Hebrew avodah zarah
Avodah Zarah
Avodah Zarah is the name of a tractate in the Talmud, located in Nezikin, the fourth Order of the Talmud dealing with damages...

) committed by the firstborns,bechorim, according to some rabbinical commentators it is clear from the Torah that the firstborn still retained their sanctity. According to Midrash Rabba
Midrash Rabba
Midrash Rabba or Midrash Rabbah can refer to part of or the collective whole of aggadic midrashim on the books of the Tanach, generally having the term "Rabbah" , meaning "great," as part of their name...

 this is based on the firstborn being referred to by God by the term "to me" (Hebrew לי). The Midrash Rabba
Midrash Rabba
Midrash Rabba or Midrash Rabbah can refer to part of or the collective whole of aggadic midrashim on the books of the Tanach, generally having the term "Rabbah" , meaning "great," as part of their name...

 states that all five places where the word "to me" (לי) is mentioned (in context with God speaking), stays sanctified forever, both in this world and the next. Of the firstborn it is written "to me all firstborn" (Hebrew לי כל בכור ; Medrash rabbah to Leviticus 2:2). The commentators to the midrash point out that even though the firstborn where disqualified from priestly duties, their sanctity was not canceled since they still retain the need to be redeemed from their sanctified state at birth. In addition, there are some Torah commentarians that explain the firstborn retains a state of sanctity in terms that it is required of him, even after being redeemed, to be more knowleadgable in Torah law and nuances than the average Jew, and to be diligent in engaging in Torah study
Torah study
Torah study is the study by Jewish people of the Torah, Hebrew Bible, Talmud, responsa, rabbinic literature and similar works, all of which are Judaism's religious texts...

.

God's reason for choosing Aaron

Jewish commentaries on the Bible
Jewish commentaries on the Bible
This article describes the first printing of the Hebrew Bible with major Jewish commentaries, notes concerning translations into Aramaic and English, lists some universally accepted Jewish commentaries with notes on their method of approach and lists modern translations into English with notes.-...

 give various reasons to the logic behind the divine choice of Aharon and his sons for the priesthood.

Hezekiah ben Manoah
Hezekiah ben Manoah
Hezekiah ben Manoah was a French rabbi and exegete.In memory of his father, who lost his right hand through his stead-fastness in the faith, Hezekiah wrote a commentary on the Pentateuch, under the title Ḥazzeḳuni. It was printed at Venice in 1524...

 explained that it was the desire of God that the priesthood rest with one specific family in order that the father of the household instill in his children the duties of the priesthood, and have his children exposed to those ideas, as a family way of life, from birth and throughout life, in order to be successful at their priestly duties. This not being the case with the firstborn (as each family could produce only one firstborn) as it is likely that the father of the firstborn not be a firstborn himself, making his knowledge of priesthood minimal and thus not being able to teach priesthood to his child.

Maimonides explained that Levi (grandfather of Aaron, was already chosen and sanctified by Jacob himself to service in duties relating to priesthood, and Aaron's appointment being a divine affirmation of Jacob's choice.

David Pardo
David Pardo
David Pardo was an 18th century Italian rabbi who lived for some time in Sarajevo and Jerusalem. Among other things, he authored a commentary on the Sifra on Leviticus....

 explained that in Tosefta
Tosefta
The Tosefta is a compilation of the Jewish oral law from the period of the Mishnah.-Overview:...

 it is explained that selectively choosing one group of servants to the King (God) exemplifies and portrays the grandor of the King by showing that not all could merely "show up" and begin serving.

The Jerusalem Targum
Targum
Taekwondo is a Korean martial art and the national sport of South Korea. In Korean, tae means "to strike or break with foot"; kwon means "to strike or break with fist"; and do means "way", "method", or "path"...

 attributes the choosing of Aaron due to the meritorious actions of Jochebed
Jochebed
According to the Torah, Jochebed was a daughter of Levi and mother of Aaron, Miriam and Moses. She was the wife of Amram, as well as his aunt. No details are given concerning her life. According to Jewish legend, Jochebed is buried in the Tomb of the Matriarchs, in Tiberias.-Birth of Moses:The...

, who saved the male Jewish infants from the infanticide decree laid forth by Pharaoh (Jerusalem Targum to Exodus 2:21). The Medrash Rabbah explains that since Kehoth, the son of Levi, merited to carry the Ark of the Covenant
Ark of the Covenant
The Ark of the Covenant , also known as the Ark of the Testimony, is a chest described in Book of Exodus as solely containing the Tablets of Stone on which the Ten Commandments were inscribed...

 and Aaron himself being the firstborn from amongst his grandchildren, thus Aaron merited the priesthood along with the title "Holy of Holys" (1 Chronicles 23:13) by way of patrilineal inheritance (Bamidbar Rabbah 6:2). From a more abstract Kabbalah
Kabbalah
Kabbalah/Kabala is a discipline and school of thought concerned with the esoteric aspect of Rabbinic Judaism. It was systematized in 11th-13th century Hachmei Provence and Spain, and again after the Expulsion from Spain, in 16th century Ottoman Palestine...

 point of view, there are some Torah commentarians, such as Elazar Shach
Elazar Shach
Elazar Menachem Man Shach also spelt Eliezer Schach, was a leading Lithuanian-born and educated Haredi rabbi in Bnei Brak, Israel. He also served as one of three co-deans of the Ponevezh yeshiva in Bnei Brak along with Rabbis Shmuel Rozovsky and Dovid Povarsky...

, that explain the priesthood as belonging to Aaron from the six days of creation.

Obadiah ben Jacob Sforno
Obadiah ben Jacob Sforno
Obadiah ben Jacob Sforno was an Italian rabbi, Biblical commentator, philosopher and physician. He was born at Cesena about 1475 and died at Bologna in 1550....

, on the verse "and to stand before the congregation and serve them" comments that one of the reasons for God's choosing of the tribe of Levi in general was to cause envy to the congregation for partaking in the sin of the Golden Calf.

In the written Torah

The written Law (Torah SheBichtav) which Maimonides called the "everlasting Torah" forbids "the foreigner who is not from the offspring of Aaron" to offer the Ketoret
Ketoret
The use of incense in Judaism was related to perfumed offerings on the altar of incense in the time of the Tabernacle and the First and Second Temple period, and was an important component of priestly liturgy in the Temple in Jerusalem....

 offering on the inner altar of burnt offering. The Law also instructs the children of Aaron to scrupulously guard the sanctity of the altar and not allow a foreigner from bringing an offering thereon (Numbers 18:7), and describes the priestly covenant as an "eternal covenant."

In the book of Malachi
Malachi
Malachi, Malachias or Mal'achi was a Jewish prophet in the Hebrew Bible. He had two brothers, Nathaniel and Josiah. Malachi was the writer of the Book of Malachi, the last book of the Neviim section in the Jewish Tanakh...

, a prophetic vision is put forth portraying the sudden appearance of God in Jerusalem and the Temple, and his immediate busying with purifying his servants, the children of Levi;

The destruction of the Second Temple in Jerusalem, 70 CE

The destruction of Jerusalem by the army of Titus in 70 CE caused the cessation of animal sacrifices and other aspects of the priesthood's function in Judaism.

The cessation of the priesthood's work in the Second Temple

At the destruction of the First Temple, the Talmud narrates how the young priests went atop the Heichal with the keys to the Heichal in hand and called out "master of the universe, since we were not fortunate to be reliable caretakers, let the keys be given to you" upon completion they heaved the keys upward -towards heaven, when a hand came forth from heaven and took the keys. Following, those young priests jumped into the inferno below.

Following this destruction of the temple, the arrest of priestly activities therein, along with the of the Davidic line
Davidic line
The Davidic line refers to the tracing of lineage to the King David referred to in the Hebrew Bible, as well as the New Testament...

, came forth verbatim from the masses that announced the God became disgusted with "the two family dynasties" -The houses of Aaron and David;

Vision of Jeremiah

As a response to the verbatim that God permanently retracted his preference to these two dynasties, the prophet
Nevi'im
Nevi'im is the second of the three major sections in the Hebrew Bible, the Tanakh. It falls between the Torah and Ketuvim .Nevi'im is traditionally divided into two parts:...

 Jeremiah
Jeremiah
Jeremiah Hebrew:יִרְמְיָה , Modern Hebrew:Yirməyāhū, IPA: jirməˈjaːhu, Tiberian:Yirmĭyahu, Greek:Ἰερεμίας), meaning "Yahweh exalts", or called the "Weeping prophet" was one of the main prophets of the Hebrew Bible...

 prophesied that the priesthood, as being the lot of Aaron, is everlasting and will not cease forever, and the priests will return to the priestly service with greater grandeur;

This vision, Jeremiah goes on to intertwine with the central existence of the nation of Israel; "if these covenants cease from before me, says God, so too the seed of Israel will cease to be a nation before me all of the days (Jeremiah 31:35).
The commentators point out that these particular visions of Jeremiah did not come forth in the days of the Second Temple
Second Temple
The Jewish Second Temple was an important shrine which stood on the Temple Mount in Jerusalem between 516 BCE and 70 CE. It replaced the First Temple which was destroyed in 586 BCE, when the Jewish nation was exiled to Babylon...

, since therein the Davidic line was not established and the priesthood was not in a state of splendor, but the vision of Jeremiah is one destined for the priestly service in the Third Temple, and the kingdom of the king Messiah
Messiah
A messiah is a redeemer figure expected or foretold in one form or another by a religion. Slightly more widely, a messiah is any redeemer figure. Messianic beliefs or theories generally relate to eschatological improvement of the state of humanity or the world, in other words the World to...

 - as Jeremiah finishes; "than will rejoice the virgin in dance and young men and elders together.. and I will infatuate the souls of the priests with abundance and my nation ; my best they will be satiated with (Jeremiah 31:12-13)". what

The Third temple in Ezekiel

The prophet Ezekiel
Ezekiel
Ezekiel , "God will strengthen" , is the central protagonist of the Book of Ezekiel in the Hebrew Bible. In Judaism, Christianity and Islam, Ezekiel is acknowledged as a Hebrew prophet...

 introduced a prophecy not recorded in any other book of the Hebrew Bible
Hebrew Bible
The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

. Ezekiel writes that in the Third Temple the priestly family of the sons of Zadok
Zadok
Zadok was a high priest of the Israelites in Jerusalem after it was conquered by David.Zadok may also refer to:*Rabbi Zadok, tanna of the 1st-century CE*Zadok the Priest, an 18th-century coronation anthem by Handel...

 will officiate all services involving the sacrifice of fats and blood on the altar. They will also enjoy an exclusive chamber in the courtyard of the House from amongst the multiple chambers therein; specifically, their chamber will have its entrance facing the North whereas all others chamber entrances face South. These privileges are cited as being given to the priests of the sons of Zadok due to their staunch non-involvement with any form of idol worship, while other families, including the priests, submitted to those forbidden services.
The Third temple in the Zohar
The Zohar Chadash
Zohar
The Zohar is the foundational work in the literature of Jewish mystical thought known as Kabbalah. It is a group of books including commentary on the mystical aspects of the Torah and scriptural interpretations as well as material on Mysticism, mythical cosmogony, and mystical psychology...

 describes the priesthood as one of five covenants listed in the Law (Zohar Chadash 4b), in the Aramaic Compendium on the Book of Exodus it is also listed as one of six unique blessings that God is destined to return to the nation of Israel. According to Sifra
Sifra
Sifra is the Halakic midrash to Leviticus. It is frequently quoted in the Talmud, and the study of it followed that of the Mishnah, as appears from Tanḥuma, quoted in Or Zarua, i. 7b. Like Leviticus itself, the midrash is occasionally called "Torat Kohanim" , and in two passages also "Sifra debe...

 it is likewise listed as one of five items that God calls "to me" (Hebrew לי) a term that connotes an eternal choice as God himself is eternal (Sifri 167a). Sifra
Sifra
Sifra is the Halakic midrash to Leviticus. It is frequently quoted in the Talmud, and the study of it followed that of the Mishnah, as appears from Tanḥuma, quoted in Or Zarua, i. 7b. Like Leviticus itself, the midrash is occasionally called "Torat Kohanim" , and in two passages also "Sifra debe...

 teaches that following the coming of the Messiah, Aaron and his sons will not require holy anointing oil
Holy anointing oil
The holy anointing oil , formed an integral part of the ordination of the priesthood and the high priest as well as in the consecration of the articles of the tabernacle and subsequent temples in Jerusalem...

 to serve as the anointing done by Moses in the Tabernacle will be considered as being in effect (Sifra
Sifra
Sifra is the Halakic midrash to Leviticus. It is frequently quoted in the Talmud, and the study of it followed that of the Mishnah, as appears from Tanḥuma, quoted in Or Zarua, i. 7b. Like Leviticus itself, the midrash is occasionally called "Torat Kohanim" , and in two passages also "Sifra debe...

 1.343).

The Sifra
Sifra
Sifra is the Halakic midrash to Leviticus. It is frequently quoted in the Talmud, and the study of it followed that of the Mishnah, as appears from Tanḥuma, quoted in Or Zarua, i. 7b. Like Leviticus itself, the midrash is occasionally called "Torat Kohanim" , and in two passages also "Sifra debe...

 and Talmud Yerushalmi explain that it is not applicable to say that just as the priesthood was removed from the priesthood and given to Aaron it is possible, in the future, that it will be removed from Aaron and returned to the firstborn, but the priesthood is and will remain the lot of Aaron and his sons for eternity.
The Babylonian Talmud presents that the eternity of the priesthood belonging to Aaron is exemplified by the notion that Ahron himself will be present to accept terumah
Terumah
Terumah is a Hebrew word, originally meaning lifted apart, but meaning donation in modern Hebrew. It can refer to:*Heave offerings - a type of sacrifice in the Hebrew Bible...

following the coming of the Messiah
Messiah
A messiah is a redeemer figure expected or foretold in one form or another by a religion. Slightly more widely, a messiah is any redeemer figure. Messianic beliefs or theories generally relate to eschatological improvement of the state of humanity or the world, in other words the World to...

.

The Tosefta
Tosefta
The Tosefta is a compilation of the Jewish oral law from the period of the Mishnah.-Overview:...

 narrates that at the time of the concealment of the Ark of the Covenant, the Aaron's rod
Aaron's rod
Aaron's rod refers to any of the staves carried by Moses' brother, Aaron, in the Old Testament of the Bible. The Bible tells how, along with Moses' rod, Aaron's rod was endowed with miraculous power during the Plagues of Egypt which preceded the Exodus...

, with its flowering almond sprouts, was included, thus symbolizing the flowering of Aaron's priesthood once the Ark will be revealed.
In addition to the title "an eternal covenant of priesthood," the tractate Animal Sacrifices explains that when God contributes an authoritative position to an individual it is for eternity. Furthering the notion that it is not plausible that the priesthood will be revoked from the tribe of Levi as it was revoked from the firstborn.
The Third Temple in Torah Commentaries
Jacob ben Asher
Jacob ben Asher
Jacob ben Asher, also known as Ba'al ha-Turimas well as Rabbi Yaakov ben Raash , was likely born in Cologne, Germany c.1269 and likely died in Toledo, Spain c.1343....

 on the threefold repetition of the words "and they will serve me" explains this as symbolic that the priests will in the future serve a third time, in the Third Temple. He also opines that the priesthood will not return to Aaron's sons in the Messianic age.

The aggadic compilation Yalkut Shimoni
Yalkut Shimoni
The Yalkut Shimoni or simply Yalkut is an aggadic compilation on the books of the Hebrew Bible. From such older haggadot as were accessible to him, the author collected various interpretations and explanations of Biblical passages, and arranged these according to the sequence of those portions of...

relates an occurrence where a Kritis queries Rabbi Yossi as to the destruction of the second temple and cessation of sacrifices (Korbanot) which seemingly disprove the words of the prophet Jeremiah describing the Kohanim of serving God "all of the days". Rabbi Yossi replied that the prophetic vision of the Kohanim serving "all of the days" is in reference to the physical sacrifices in the temple, but to the Torah study
Torah study
Torah study is the study by Jewish people of the Torah, Hebrew Bible, Talmud, responsa, rabbinic literature and similar works, all of which are Judaism's religious texts...

 by the Kohen of Torah Laws delving on the sacrifices (Mishnayot Kodoshim laws).
The priesthood in the Messianic era
With the priesthood being portrayed in the Hebrew Bible
Hebrew Bible
The Hebrew Bible is a term used by biblical scholars outside of Judaism to refer to the Tanakh , a canonical collection of Jewish texts, and the common textual antecedent of the several canonical editions of the Christian Old Testament...

 and Chazalic writings as being the eternal lot of the "Home of Aaron" (בית אהרן"), the written recordings of Rabbi Chaim Vital of his master Rabbi Yitzchok Luria (the Arizal) introduce an idea that in the Age to Come (Hebrew LeAtid Lavoh "the Messianic era") the souls belonging to the spiritual rootsource of Kayin
Kayin
Kayin can refer to:* Kayin State, an administrative division of Myanmar * Kayin or Karen people, a minority ethnic group in Myanmar* alternative spelling for Cain* Kayin Amoh, a character in the Battle Arena Toshinden fighting game series...

, which are essentially the souls of the firstborn and Levites, will become clear and purified and will thus merit to serve in the Third Temple. This idea is exegesized
Exegesis
Exegesis is a critical explanation or interpretation of a text, especially a religious text. Traditionally the term was used primarily for exegesis of the Bible; however, in contemporary usage it has broadened to mean a critical explanation of any text, and the term "Biblical exegesis" is used...

 from the verse "אם תטיב שאת" (if you will better yourself you will be uplifted) explained as when you will better yourself you will merit to the priesthood which is titled "שאת" (uplifted).

This idea is echoed by Rabbi Schneur Zalman of Liadi in his book The Tanya
Tanya
The Tanya is an early work of Hasidic philosophy, by Rabbi Shneur Zalman of Liadi, the founder of Chabad Hasidism, first published in 1797. Its formal title is Likkutei Amarim , but is more commonly known by its opening word, Tanya, which means "it was taught in a beraita"...

, as by his son and successor The Mitteler Rebbe In Numbers col. 2 p. 976 the Rebbe brings the standard concept of Aaron and sons serving in the times of Messiah. And his successor, the third Lubavitch Rebbe, Menachem Mendel Schneersohn
Menachem Mendel Schneersohn
Menachem Mendel Schneersohn also known as the Tzemach Tzedek was an Orthodox rabbi and the third Rebbe of the Chabad Lubavitch chasidic movement.-Biography:...

.

Likewise, Chaim ibn Attar
Chaim ibn Attar
Chaim ben Moses ibn Attar also known as the Ohr ha-Chaim after his popular commentary on the Pentateuch, was a Talmudist and kabbalist; born at Meknes, Morocco, in 1696; died in Jerusalem, Israel July 7, 1743. He was one of the most prominent rabbis in Morocco.In 1733 he decided to leave his native...

 in his commentary to Jacob's blessing to his son Reuben ("בכורי אתה" you are my firstborn) writes that in the Age to Come the firstborn will work alongside the priests in the Third Temple Of note is Chaim ibn Attar
Chaim ibn Attar
Chaim ben Moses ibn Attar also known as the Ohr ha-Chaim after his popular commentary on the Pentateuch, was a Talmudist and kabbalist; born at Meknes, Morocco, in 1696; died in Jerusalem, Israel July 7, 1743. He was one of the most prominent rabbis in Morocco.In 1733 he decided to leave his native...

's subsequent writing to Numbers 3:45, where he emphasizes that the tribe of Levi will eternally never be demoted from their duties. The idea is further quoted by Ithamar HaKohen with the explanation that in the Age to Come the sin of the Golden Calf
Golden calf
According to the Hebrew Bible, the golden calf was an idol made by Aaron to satisfy the Israelites during Moses' absence, when he went up to Mount Sinai...

 will be rectified thus allowing the firstborn to work alongside the priests in the Third Temple. According to the commentary of Jonathan Eybeschutz
Jonathan Eybeschutz
Jonathan Eybeschutz , was a Talmudist, Halachist, Kabbalist, holding positions as Dayan of Prague, and later as Rabbi of the "Three Communities": Altona, Hamburg and Wandsbek. With Jacob Emden, he is well known as a protagonist in the Emden-Eybeschütz Controversy.-Biography:Eybeschütz's father was...

 on the Haphtorah the priests descending from Zadok
Zadok
Zadok was a high priest of the Israelites in Jerusalem after it was conquered by David.Zadok may also refer to:*Rabbi Zadok, tanna of the 1st-century CE*Zadok the Priest, an 18th-century coronation anthem by Handel...

 will function as high priests
Kohen Gadol
The High Priest was the chief religious official of Israelite religion and of classical Judaism from the rise of the Israelite nation until the destruction of the Second Temple of Jerusalem...

, and the firstborn will function as standard priests.
Encompassing explanation
This seeming contradiction to numerous verses and chazal
Chazal
Chazal or Ḥazal is an acronym for the Hebrew "Ḥakhameinu Zikhronam Liv'rakha",...

ic discourses specifically detailing the service of the Aaron and his sons in the times of the Messiah
Messiah
A messiah is a redeemer figure expected or foretold in one form or another by a religion. Slightly more widely, a messiah is any redeemer figure. Messianic beliefs or theories generally relate to eschatological improvement of the state of humanity or the world, in other words the World to...

 was explained by Menachem Schneerson, the seventh Lubavitch Rebbe succeeding Rabbi Schneur Zalman, in his Holy Letters of the Rebbe
Igrot Kodesh
Igrot Kodesh is a collection of correspondence and responses of the seventh Rebbe of Chabad-Lubavitch, Menachem Mendel Schneerson....

. There, Rabbi Schneerson explains that the future change as presented in Hasidic Judaism
Hasidic Judaism
Hasidic Judaism or Hasidism, from the Hebrew —Ḥasidut in Sephardi, Chasidus in Ashkenazi, meaning "piety" , is a branch of Orthodox Judaism that promotes spirituality and joy through the popularisation and internalisation of Jewish mysticism as the fundamental aspects of the Jewish faith...

 and Kabbalah will appear purely on a spiritual level, with the soul of the Levi (i.e. those souls stemming from the rootsource of Cain) being born into the physical bodies of the sons of Aaron. Thus, allowing the spiritual qualities of the Levi, in the days of the Messiah being of extra-fine character, to be housed in the body of the son of Aaron the Priest
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