لِّيَسْـَٔلَ ٱلصَّٰدِقِينَ عَن صِدْقِهِمْ ۚ وَأَعَدَّ لِلْكَٰفِرِينَ عَذَابًا أَلِيمًا

That He may question the truthful of their truth, and He has prepared for the unbelievers a painful punishment.