Dausa was a bishop

Bishop

A bishop is an ordained or consecrated member of the Christian clergy who is generally entrusted with a position of authority and oversight. Within the Catholic Church, Eastern Orthodox, Oriental Orthodox Churches, in the Assyrian Church of the East, in the Independent Catholic Churches, and in the...

 and martyr

Martyr

A martyr is somebody who suffers persecution and death for refusing to renounce, or accept, a belief or cause, usually religious.-Meaning:...

 of the Christian church

Christian Church

The Christian Church is the assembly or association of followers of Jesus Christ. The Greek term ἐκκλησία that in its appearances in the New Testament is usually translated as "church" basically means "assembly"...

.

He was a priest

Priest

A priest is a person authorized to perform the sacred rites of a religion, especially as a mediatory agent between humans and deities. They also have the authority or power to administer religious rites; in particular, rites of sacrifice to, and propitiation of, a deity or deities...

 at Bet Zabdai in Mesopotamia

Mesopotamia

Mesopotamia is a toponym for the area of the Tigris–Euphrates river system, largely corresponding to modern-day Iraq, northeastern Syria, southeastern Turkey and southwestern Iran.Widely considered to be the cradle of civilization, Bronze Age Mesopotamia included Sumer and the...

. In 344, he was taken to Persia with his bishop Heliodorus of Bet Zabdai

Heliodorus of Bet Zabdai

Heliodorus of Bet Zabdai was a bishop of Bet Zabdai in Mesopotamia and a martyr. He was an ethnic Assyrian.He was taken to Persia as a prisoner of war by Shapur II. He died as a result of ill treatment and fatigue at Daskarata on the Great Zab, in 344. He is commemorated with a feast day of August...

 at the order of Shapur II

Shapur II

Shapur II the Great was the ninth King of the Persian Sassanid Empire from 309 to 379 and son of Hormizd II. During his long reign, the Sassanid Empire saw its first golden era since the reign of Shapur I...

. As Heliodorus lay dying at Daskarata, he consecrated Dausa to be his successor bishop. Dausa was beheaded with 275 comnpanions at Masabadan in Media, after having refused to worship the sun. He is commemorated with a feast day of August 20.