Musnad Ahmad — Hadith 24009/37

Yaqoob narrated to us, Abdul Aziz ibn Al-Muttalib informed us, from Saeed ibn Amr ibn Shurahbeel, from his grandfather, that he said: A book I found among the books of Saeed ibn Saad ibn Ubadah, that Umara ibn Hazm testified: That the Messenger of Allah, peace and blessings be upon him, "ruled with an oath along with a witness." Zayd ibn Al-Hubab said: I asked Malik ibn Anas about the oath and the witness: Is it permissible in divorce and emancipation? He said: No, this is only in buying, selling, and the like.