According to a Roman ecclesiastical source,[4] the Sassanids besieged Theodosiopolis for 30 days, with thousands of soldiers and even siege engines (that the source calls helepolis). According to this source, the Romans did not try to aid the besieged, but the Sassanids were convinced to lift the siege when the bishop of the city, Eunomius, had a stone-thrower, named after Thomas the Apostle, kill a lesser king of the Sassanid army.