Sahih Muslim | Book 1 | Hadith Number 345
Narrated by Abu Musa
Abu Musa reported: The Messenger of Allah (peace be upon him) was standing amongst us and (he said) four (things): Verily Allah dock not sleep and it does not befit Him to sleep. He raises the scale and lowers it. The deeds of the day are presented to Him in the night and the deeds of the night in the day.