It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: The angels of the night and the angels of the day gather at the times of Fajr and Asr prayers. When the angels of the day ascend to the heavens, Allah Almighty asks them, "Where have you come from?" They say, "We have come from Your servants; when we left them, they were praying, and when we went to them, they were praying." Then when the angels of the night ascend to the heavens, Allah Almighty also asks them, "Where have you come from?" They reply, "We have come from Your servants; when we went to them, they were praying, and when we left them, they were praying."