Musnad Ahmad 32:679

Ibrahim narrated to us, he said: Ibn al-Mubarak narrated to us, from Aban ibn Khalid, he said: I heard Abdullah ibn Rawahah saying: Anas ibn Malik narrated to me, "That he never saw the Messenger of Allah, may Allah bless him and grant him peace, pray the Duha (forenoon) prayer at all, except when he would go out on a journey, or arrive from a journey."