Musnad Abu Ya'la al-Mawsili 129:153

Zuhayr narrated to us, Affan narrated to us, Hammad narrated to us, from Humayd, from Anas, that he was asked about the hair of the Messenger of Allah (may Allah bless him and grant him peace). He said: "I have not seen hair more similar to the hair of the Prophet (may Allah bless him and grant him peace) than the hair of Qatadah." Qatadah rejoiced on that day.