Musnad Ahmad 32:1321

Abu Sa’id narrated to us, Shu’bah narrated to us, Ja’far ibn Ma’bad, the nephew of Humayd ibn ‘Abdullah al-Himyari, narrated to us, saying: I went with Humayd to Anas ibn Malik, and he said: When the people would pledge allegiance to the Messenger of Allah (peace and blessings of Allah be upon him)—or when we would pledge allegiance to the Messenger of Allah (peace and blessings of Allah be upon him)—he would instruct us or say to us: "In what you are able." ‘Abdullah said: My father said: "He is not Humayd al-Tawil."