Musnad Abu Ya'la al-Mawsili 105:33

Ibrahim ibn al-Hajjaj al-Sami narrated to us, Hammad narrated to us, from Abu al-Zubayr, from Muhammad ibn Ali, from Ammar, who said: I came to the Messenger of Allah, may Allah bless him and grant him peace, while he was praying, and I greeted him, and he returned the greeting to me.