At the request of the Arab king of Ghassan he was sent on a mission to the East after being consecrated bishop of Edessa; and the rest of his life was spent in organizing the Monophysite Church of eastern Syria.
- Before passing to the time of Mahomet it is necessary to take account of three other Arabian powers, those of Hira, Ghassan and Kinda.
They ruled over the tribe of Ghassan in the extreme north-west of Arabia, east of the Jordan, from near Petra in the south to the neighbourhood of Rosafa in the north-east.
Thus at the time of Mahomet's advent the country was peopled by various tribes, some more or less settled under the governments of south Arabia, Kinda, Hira and Ghassan, these in turn depending on Abyssinia, Persia and Rome (i.e.
At that time the small Arabian kingdoms of Ghassan and Hira had arisen in the western and eastern borderlands of cultivation; these now presented to Moslem conquest its nearest and natural goal.
The kingdoms of Ghassan and Hira, advanced posts hitherto, now became the headquarters of the Arabs; the new empire had its centres on the one hand at Damascus, on the other hand at Kufa and Basra, the two newly-founded cities in the region of old Babylonia.