Al-An‘âm 6:61
وَهُوَ الْقَاهِرُ فَوْقَ عِبَادِهِ ۖ وَيُرْسِلُ عَلَيْكُمْ حَفَظَةً حَتَّىٰ إِذَا جَاءَ أَحَدَكُمُ الْمَوْتُ تَوَفَّتْهُ رُسُلُنَا وَهُمْ لَا يُفَرِّطُونَ ٦١
Wahuwa alqahiru fawqa AAibadihi wayursilu AAalaykum hafathatan hatta itha jaa ahadakumu almawtu tawaffathu rusuluna wahum la yufarritoona
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And He has dominance over His servants, and He sends to you (angels as) guardians until when death approaches any of you, (then the angels) We send take his soul and they do not err (or default). (6:61)