Umar's Assurance of safety to the people of Aelia, known as al-ʿUhda al-ʿUmariyya, a 637 agreement between the second Caliph Umar ibn al-Khattab and Sophronius of Jerusalem, the Patriarch of Jerusalem
In 637, after a long siege of Jerusalem, Patriarch Sophronius surrendered Jerusalem to Caliph Umar, but secured the Covenant of Umar I, which recognised Christian rights to protection.
He served in the Karnobat parish and went to a monastery in Arbanasi in 1794, becoming Bishop of Vratsa under the name of Sophronius on 17 September.
The Greek tradition has a long unbroken history of elders and disciples, such as Sophronius and John Moschos in the seventh century, Symeon the Elder and Symeon the New Theologian in the eleventh century, and contemporary charismatic gerontes such as Porphyrios and Paisios.