Syriac fathers on the Qurbana: Theodor of Mopsuestia (+428), Narsai of Nisibis (+ 502), Isho Yahb I (+ 596), Gabriel Qatraya bar Lipah (615), Abraham Qatraya Bar Lipah (7th C.), Iso Yahb III (+ 659), Isodad of Merv (850) Anonymous author (10/11th c.), Iso Yahb IV (+ 1025), Yohannan bar Zobi (+ 1246), Abdiso bar Brika of Nisibis (+ 1318), Timothy II (+ 1332).