On his father's authority (this is AbulWalid's version): A man emancipated a share in a slave and the matter was mentioned to the Prophet (ﷺ). He said: Allah has no partner.

Ibn Kathir added in his version: The Prophet (ﷺ) allowed his emancipation.
Sunan Abi Dawud Book 31, Hadith 8
← Previous Hadith Safinah said: I was a slave of Umm Salamah, and she said: I shall emancipate you, but I stipulate that you must serve the Messenger of Allah (ﷺ) as long as you live. I said: Even if you do not make a stipulation, I shall not leave the Messenger of Allah (ﷺ). She then emancipated me and made the stipulation with me.

Sunan Abi Dawud Book 31, Hadith 7 Next Hadith → A man emancipated his share in a slave. The Prophet (ﷺ) allowed his (full) emancipation, and required him to pay the rest of his price.

Sunan Abi Dawud Book 31, Hadith 9