Sunan Abi Dawud Book 5, Hadith 14
When the Prophet (ﷺ) prayed the two rak'ahs of the dawn prayer, he would lie down if I was asleep; in case I was awake, he would talk to me.
When the Messenger of Allah (ﷺ) finished his prayer late in the night, he would see. If I was awake, he would talk to me. If I was sleeping, he would awaken me, and pray two rak'ahs, then he would lie down as long as the mu'adhdhin came to him and call him for the dawn prayer. Then he would pray two rak'ahs lightly and come out for prayer.
I came out with the Prophet (ﷺ) to offer the dawn prayer. When he passed by a sleeping man he called him for prayer or moved him with his foot. The narrator Ziyad said: This tradition has been reported to us by AbulFadl.