Musnad Ahmad 266:5

Abu Sa’id, the freed slave of Banu Hashim, narrated to us, saying: Harb—meaning Ibn Shaddad—narrated to us, saying: Yahya ibn Abi Kathir narrated to us, from Abu Salamah, that he heard Abu Usayd, that he heard the Prophet, peace and blessings of Allah be upon him, saying: "The best of the homes of the Ansar," and then he mentioned the hadith.