Musnad Ahmad 3:134

Abdullah narrated to us, Yahya bin Uthman—meaning al-Harbi—Abu Zakariya narrated to me, Ismail bin Ayyash narrated to us, from a man whom he named, from Muhammad bin Yusuf, from Amr bin Uthman bin Affan, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Sleeping in the morning prevents provision."