Surah Ali'Imran, Verse 106

يَوۡمَ تَبۡيَضُّ وُجُوهٞ وَتَسۡوَدُّ وُجُوهٞۚ فَأَمَّا ٱلَّذِينَ ٱسۡوَدَّتۡ وُجُوهُهُمۡ أَكَفَرۡتُم بَعۡدَ إِيمَٰنِكُمۡ فَذُوقُواْ ٱلۡعَذَابَ بِمَا كُنتُمۡ تَكۡفُرُونَ١٠٦

yawma tabyaḍḍu wujūhun wataswaddu wujūhun fa-ammā alladhīna is'waddat wujūhuhum akafartum baʿda īmānikum fadhūqū l-ʿadhāba bimā kuntum takfurūna

On the Day [some] faces will turn white and [some] faces will turn black. As for those whose faces turn black, [to them it will be said], "Did you disbelieve [i.e., reject faith] after your belief? Then taste the punishment for what you used to reject."