Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Angels take turns among you by night and by day, and they gather at the times of Fajr and Asr prayers. Then those angels who have stayed among you ascend, and Allah asks them—though He knows best about His servants—"In what state did you leave My servants?" They reply, "We left them while they were praying (Fajr), and when we came to them, they were praying (Asr)."