Abu Dawud Book 024, Hadith Number 3922.

Chapter : Emancipation of a share in a slave.

Narated By Usamah ibn Umayr al-Huzali : (This is Abu Walid's version): A man emancipated a share in a slave and the matter was mentioned to the Prophet (pbuh). He said: Allah has no partner.

Ibn Kathir added in his version: The Prophet (pbuh) allowed his emancipation.