Musnad Ahmad 32:1295

'Affan narrated to us, Hammad narrated to us, from Humayd, that Anas was asked about the hair of the Prophet, peace and blessings of Allah be upon him. He said: "I have not seen hair more similar to the hair of the Prophet, peace and blessings of Allah be upon him, than the hair of Qatadah." Qatadah rejoiced on that day.