Dictionary of Christian Biography and Literature to the End of the Sixth Century/Sabbatius, bp. of Constantinople

Sabbatius (2), ordained by Marcianus as Novatianist bp. of Constantinople, seceded, before 380, from the main body of that sect, with two others, Theoctistes and Macarius, maintaining that Easter ought to be celebrated on the same day and in the same manner as by the Jews. He also complained that unworthy persons were admitted to the Novatianist communion, thus finding the same fault with the Novatianists that they did with the church. He became bishop of a small sect, called after him Sabbatiani, whose baptism was recognized in the 7th canon of the 2nd general council. Sozomen (H. E. vii. 18) gives a long account of his secession.

[G.T.S.]