فَلَنُذيقَنَّ الَّذينَ كَفَروا عَذابًا شَديدًا وَلَنَجزِيَنَّهُم أَسوَأَ الَّذي كانوا يَعمَلونَ

We will make those who disbelieve taste the severe punishment and reward them with the worst of what they used to do.