Musnad Ahmad 1153:1243

'Uthman ibn 'Umar narrated to us, Ibn Abi Dhi'b informed us, from al-Qasim ibn 'Abbas, from 'Abdullah ibn Nayyar al-Aslami, from 'Urwah, from 'Aishah: "The Messenger of Allah (ﷺ) was brought a gazelle that had beads [or ornaments] in it, so he divided it between the free woman and the slave woman." 'Aishah said: "And my father used to divide between the free man and the slave." My father [Ahmad ibn Hanbal] said: Yazid ibn Harun said: "So he divided between the free woman and the slave woman equally."