Sunan Abi Dawud 3940
سنن أبي داود#3940SahihAbd Allah b. 'Umar reported the Messenger of Allah (ﷺ) as saying:If anyone emancipates his share in slave, a fair price for the slave should be fixed, give his partners their shares, and the slave be thus emancipated. Otherwise he is emancipated to the extent of the share which he emancipated
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (2522) Sahih Muslim (1501)
In-book reference: 31:15