Since the Banu Qurayza had been an ally of the Banu Aus during the Battle of Bu'ath, they choose Sa'ad ibn Mua'dh, the chief of the Banu Aus [11] as their judge. He, in accordance with the punishment typically meted out by the Jews themselves in cases of treachery, condemned the men to death and the women and children to slavery.[3] Sa'ad ibn Mua'dh himself died shortly after the event from injuries that he had received during the Battle of the Trench.