Battle of Khaybar
In May 628 CE, the Muslims defeated several Jewish tribes (including the Banu Nadir) at the Battle of Khaybar. The Jews had surrendered, and were allowed to remain in Khaybar on the provision that they give half of their annual produce to the Muslims. The land itself became the property of the Muslim state. This agreement, Stillman says, did not extend to the Banu Nadir tribe, who were given no quarter. Safiyya's first husband, Kenana ibn al-Rabi, was killed after being tortured for refusing to reveal the location of the treasure.