It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: There are some angels of Allah who come to the earth in turns; some of these angels are for the night and some for the day. These angels gather at the times of Fajr prayer and Asr prayer. Then those angels who have stayed among you ascend to the heavens. Although Allah knows everything, He asks them: In what condition did you leave My servants? They say: When we left them, they were praying, and when we came to them, they were praying as well.