110 Hadith Qudsi, Chapter: 110 Ahadith Qudsi (Sacred Hadith)

that Allah' s Messenger (PBUH) said: Some angels come to you in succession by night and some others come to you by day. they meet together at the time of Dawn (Fajr) and Afternoon (Asr) prayers. Then those who passed the night with you, ascend to heaven. There Allah asks them though He knows best about them: In what state did you leave My slaves? The angels reply: When we left them, they were offering prayers and when we reached them, they were offering prayers. (This Hadith is sound and reported by Bukhari and Muslim).