Bp. of Beth Raman (north of Tagrit on the Tigris), and writer. Almost all that is known about him comes from a short anonymous biography (in two recensions, BHO 779–80) transmitted with his works. According to this, he was born in the town of Balad (modern Eski Mosul) and entered the Monastery of Mar Sargis on the ‘Dry Mountain’ (that is, Buṭmān, 15 km. northeast of Balad on the west bank of the Tigris). He became a monk at age twenty, then ten years later, bp., taking the name Severos. His diocese of Beth Raman was suffragan to the metr. of Tagrit. Other sources add to his diocese variously Beth Kiyonaye (that is, Beth Bawazig or Beth Waziq, a neighbouring town), Beth ʿArbaye , and Mosul . He died on 12 Feb. 903 at the age of seventy (or acc. to other sources, ninety). This date puts his birth in ca. 833 and his consecration as bp. in ca. 863.
Mushe’s writings cover a wider area of biblical exegesis, traditional theology, and liturgy than any previous Syriac writer had attempted to span. Perhaps he was aiming at a summa that would defend the Christian religion within the Muslim world. His works are characterized by divisions into short ‘chapters’ or other sections, treating specific points in a formulaic way, often by question and answer. Mushe is regarded as one of the great scholars of the Syr. Orth. Church. This scholarship was, however, largely a matter of compiling excerpts from sources, and modern studies of his works have generally been concerned with the analysis of these sources. They included E.-Syr. ones, which is not so surprising given that Mushe’s career was spent on the E. edge of Syr. Orth. territory.