Divination and Omens (Kitab Al-Kahanah Wa Al-Tatayyur)
Dawud :: Book 29 : Hadith 3922
Narrated Usamah ibn Umayr al-Huzali:
(This is AbulWalid's version): A man emancipated a share in a slave and the matter was mentioned to the Prophet (peace_be_upon_him). He said: Allah has no partner.
Ibn Kathir added in his version: The Prophet (peace_be_upon_him) allowed his emancipation.