فَلَنُذِيقَنَّ ٱلَّذِينَ كَفَرُواْ عَذَابٗا شَدِيدٗا وَلَنَجۡزِيَنَّهُمۡ أَسۡوَأَ ٱلَّذِي كَانُواْ يَعۡمَلُونَ

We will surely make the faithless taste a severe punishment, and We will surely requite them by the worst of what they used to do.