(79) باب فِي قَوْلِهِ عَلَيْهِ السَّلاَمُ: «إِنَّ اللَّهَ لاَ يَنَامُ». وَفِي قَوْلِهِ: «حِجَابُهُ النُّورُ لَوْ كَشَفَهُ لأَحْرَقَ سُبُحَاتُ وَجْهِهِ مَا انْتَهَى إِلَيْهِ بَصَرُهُ مِنْ خَلْقِهِ»
Abu Musa reported:
The Messenger of Allah (ﷺ) was standing amongst us and (he said) four (things): Verily Allah does 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.
Reference: Sahih Muslim 179 c
In-book reference: Book 1, Hadith 354
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 345