Takhrij Hadith 1111: "Angels take turns among you…"

Angels take turns among you by night and by day, and they gather at the Asr prayer and the Fajr prayer. Then those who spent the night among you ascend, and He asks them—though He knows best about them,How did you leave My servants? They reply,We left them while they were praying, and we came to them while they were praying.