Gabriel of Qartmin was an 7th century abbot in the famous Syria

Syria

Syria , officially the Syrian Arab Republic , is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the West, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest....

n Orthodox

Orthodox Christianity

The term Orthodox Christianity may refer to:* the Eastern Orthodox Church and its various geographical subdivisions...

 Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 Qartmin monastery located in present day Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

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A medieval manuscript titled the Life of Gabriel of Qartmin provides a glimpse into the events in the middle east during the 7th century.

The quote below provides an example of the Dhimmi

Dhimmi

A , is a non-Muslim subject of a state governed in accordance with sharia law. Linguistically, the word means "one whose responsibility has been taken". This has to be understood in the context of the definition of state in Islam...

 agreements of Christians during the Arab conquests.

This lord Gabriel went to the ruler (ahid shultana) of the sons of Hagar

Hagar (Bible)

Hagar , according to the Abrahamic faiths, was the second wife of Abraham, and the mother of his first son, Ishmael. Her story is recorded in the Book of Genesis, mentioned in Hadith, and alluded to in the Qur'an...

, who was Umar bar Khattab

Umar

`Umar ibn al-Khattāb c. 2 November , was a leading companion and adviser to the Islamic prophet Muhammad who later became the second Muslim Caliph after Muhammad's death....

, in the city of Gezirta. He (Umar) received him with great joy, and after a few days the blessed man petitioned this ruler and received his signature to the statutes and laws, orders and prohibitions, judgements and precepts pertaining to the Christians, to churches and monasteries, and to priests and deacons that they do not give the poll tax, and to monks that they be freed from any tax (madatta). Also that the wooden gong should not be banned and that they might chant hymns before the bier when it comes out from the house to be buried, together with many [other] customs. This governor (shallita) was pleased at the coming to him of the blessed man and this holy one returned to the monastery with great joy. (Gabriel of Qartmin, Life XII, 72 [p. 123])