يَوْمَ تَبْيَضُّ وُجُوهٌ وَتَسْوَدُّ وُجُوهٌ ۚ فَأَمَّا ٱلَّذِينَ ٱسْوَدَّتْ وُجُوهُهُمْ أَكَفَرْتُم بَعْدَ إِيمَـٰنِكُمْ فَذُوقُوا۟ ٱلْعَذَابَ بِمَا كُنتُمْ تَكْفُرُونَ
Yawma tabyaddu wujoohunw wa taswaddu wujooh; faammal lazeenas waddat wujoohum akafartum ba'da eemaanikum fazooqul 'azaaba bimaa kuntum takfuroon
جس دن بہت سے منہ سفید ہوں گے اور بہت سے منہ سیاہ تو جن لوگوں کے منہ سیاہ ہوں گے (ان سے خدا فرمائے گا) کیا تم ایمان لا کر کافر ہوگئے تھے؟ سو (اب) اس کفر کے بدلے عذاب (کے مزے) چکھو
On the day when some faces will be bright and some faces will be dark — as for those whose faces are darkened: did you deny after your belief? Then taste the punishment for the denial you held to.
Arabic already used a whitened face for vindication and a blackened one for disgrace, the idiom behind the man in Surah An-Nahl whose face darkens at news of a daughter, so the image carries public standing before it carries colour. Whether that day makes the idiom literal or keeps it figurative is a question the commentaries leave open. The verse also lands directly after the warning against splitting into factions.