It was narrated from Yahya bin 'Abbad bin 'Abdullah bin Az-Zubair, from his grandfather, that he used to say:
"In the year of Khaibar, the Messenger of Allah allocated four shares to Az-Zubair bin Al-'Awwam: A share of Az-Zubair, a share for the relatives of Safiyyah bint 'Abdul-Muttalib, the mother of Az-Zubair, and two shares for the horse."