Musannaf Ibn Abi Shayba 35:49

Al-Fadl ibn Dukayn narrated to us, from Abd al-Jabbar ibn Abbas, from Awn ibn Abi Juhayfah, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said to those who slept with him until the sun rose: "Indeed, you were dead, and Allah returned your souls to you. So whoever sleeps through a prayer or forgets a prayer, let him pray it when he remembers it and when he wakes up."