"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." (Using translation from Nasāʾī 3593)  

أَنَّهُ كَانَ يَقُولُ «ضَرَبَ رَسُولُ اللهِ ﷺ عَامَ خَيْبَرَ لِلزُّبَيْرِ بْنِ الْعَوَّامِ أَرْبَعَةَ أَسْهُمٍ سَهْمٌ لِلزُّبَيْرِ وَسَهْمٌ لِذِي الْقُرْبَى لِصَفِيَّةَ بِنْتِ عَبْدِ الْمُطَّلِبِ أُمِّ الزُّبَيْرِ وَسَهْمَانِ لِلْفَرَسِ»