[7][8] Catholicos Christopher I of Armenia is attested to have ordained Ahudemmeh as bishop of Beth Arbaye by Bar Hebraeus in his Ecclesiastical History, however, this has since been disregarded due to the argument of François Nau.
[10][11] He then set about preaching miaphysite Christianity in the region of Beth Arbaye, which stretched from Tikrit in the south to Nisibis in the north, bound in the west by the Khabur and the Tigris in the east,[9] and was inhabited by Arab tribes, the Tanukh, Banu Uqayl, and Tayy.
[5] Ahudemmeh travelled amongst the Arabs, during which time he is credited with a number of miracles, including the exorcism of a sheikh's daughter, expulsion of demons from places of worship, purification of lepers, and curing the sick.
[12] At the encampments of the nomadic Arabs, Ahudemmeh preached Christianity, performed baptisms, consecrated a priest and deacon for each community, and established churches named after clan leaders, thus encouraging their participation and leadership.
[16][17] He is also credited with a Syriac grammatical text, which was based on Greek grammar, attested by the monk John bar Zoʿbi at the end of the twelfth century and beginning of the thirteenth.