After the expulsion of the Banu al-Nadir, he and his family retired to Khaybar, where they possessed a castle called Qamus.
[1] After Muslims won the Battle of Khaybar, Kenana ibn al-Rabi was executed and Muhammad took his widow, Safiyya, as a concubine.
A Jewish man reported to Muhammad, claiming to have seen Kenana frequenting a certain ruin early every morning.
[5] Shibli Nomani doubts most of the story, and maintains that Kenana was executed for the killing of Mahmud not for concealing the treasure.
[3] Cheragh Ali has also called this account "spurious" and maintains that Kenana was executed for "treacherously killing Mahmud".
Al-Mubarakpuri maintains that Kenana ibn al-Rabi was bound by agreements between Muhammad and Khaybar to not conceal anything from the Muslims.