Musannaf Ibn Abi Shayba 13:2628

Abu Bakr narrated to us, he said: Abu Dawud narrated to us, from Sufyan, from Sa’d ibn Ibrahim, from [Ibn] Abi Salamah, from his father, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade *al-muhaqalah* and *al-muzabanah*.