In the battle of the Trench, the Jews of Banu Quraiza acted treacherously. Their treachery was established, and they were given the ultimatum. Instead of appeasing the Muslims they chose to adopt an attitude of defiance. They were besieged, and they ultimately surrendered. An arbitrator was appointed to determine their fate. The arbitrator gave the award that in accordance with the Jewish law all male Jews should be killed, and all children and women should be taken captive as slaves. This award was duly executed. All Jewish slaves were purchased by Uthman. Most of these slaves accepted Islam and Uthman liberated them. It is reported that Uthman used to liberate a slave every Friday.