(12) باب مَنْ أَعْتَقَ شِرْكًا لَهُ فِي عَبْدٍ
'Abdullah b. 'Umar reported Allah's Messenger (ﷺ) as saying:
He who gives up his share in a slave, and he has money enough to meet the full price, a fair price for him should be fixed; otherwise be has emancipated him to the extent that he has emancipated.
Reference: Sahih Muslim 1501 e
In-book reference: Book 27, Hadith 75
USC-MSA web (English) reference(deprecated numbering scheme): Book 15, Hadith 4104