يَوْمَ تَبْيَضُّ وُجُوهٌ وَتَسْوَدُّ وُجُوهٌ ۚ فَأَمَّا الَّذِينَ اسْوَدَّتْ وُجُوهُهُمْ أَكَفَرْتُم بَعْدَ إِيمَانِكُمْ فَذُوقُوا الْعَذَابَ بِمَا كُنتُمْ تَكْفُرُونَ (106)
(3:106) On the Day when some faces will turn bright and ther faces will turn dark. Those whose faces have turned dark will be told: 'Did you fall into unbelief after you had been blessed with belief? Taste, then, chastisement for your unbelief.