"He would sleep like that while he was sitting up."
Sunan Ibn Majah Book 1, Hadith 210
← Previous Hadith The Messenger of Allah slept until he was breathing deeply, then he got up and prayed.

Sunan Ibn Majah Book 1, Hadith 209 Next Hadith → The Messenger of Allah said: "The eye is the leather strap (that ties up) the anus, so whoever falls asleep, let him perform ablution."

Sunan Ibn Majah Book 1, Hadith 211