Musnad Ahmad 490:1

Hushaym narrated to us, 'Abd al-Malik ibn 'Umayr informed us, from Iyad ibn Laqit, who said: Abu Rimtha al-Tamimi informed me, saying: I came to the Messenger of Allah, may Allah bless him and grant him peace, and with me was a son of mine. He said, "Is this your son?" I said, "Yes, I bear witness to it." He said, "He does not commit a crime against you, and you do not commit a crime against him." He said: And I saw the gray hair to be red.