Sahih Muslim , Book 27, Hadith 78 (In-Book) ⓘ
Ibn 'Umar reported Allah's Apostle as saying: He who gives up his share in a slave, the remaining (share) will be paid out of his riches if his riches are enough to meet the price of the slave.
وَحَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنِ ابْنِ عُمَرَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " مَنْ أَعْتَقَ شِرْكًا لَهُ فِي عَبْدٍ عَتَقَ مَا بَقِيَ فِي مَالِهِ إِذَا كَانَ لَهُ مَالٌ يَبْلُغُ ثَمَنَ الْعَبْدِ " .
also referenced under: Hadith 1501 (Reference) & Book 15, Hadith 4107 (USC-MSA)