Sahih al-Bukhari 2491
حَدَّثَنَا عِمْرَانُ بْنُ مَيْسَرَةَ، حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا أَيُّوبُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ...
Narrated Nafi`:Ibn `Umar said, "Allah's Messenger (ﷺ) said, 'If one manumits his share of a jointly possessed slave, and can afford the price of the other share...