The sealing of hearts

كَيْفَ يَهْدِى ٱللَّهُ قَوْمًا كَفَرُوا۟ بَعْدَ إِيمَـٰنِهِمْ وَشَهِدُوٓا۟ أَنَّ ٱلرَّسُولَ حَقٌّ وَجَآءَهُمُ ٱلْبَيِّنَـٰتُ ۚ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّـٰلِمِينَ

How shall Allāh guide a people who disbelieved after their belief and had witnessed that the Messenger is true and clear signs had come to them? And Allāh does not guide the wrongdoing people.

رَضُوا۟ بِأَن يَكُونُوا۟ مَعَ ٱلْخَوَالِفِ وَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

They were satisfied to be with those who stay behind, and their hearts were sealed over, so they do not understand.

كَذَٰلِكَ حَقَّتْ كَلِمَتُ رَبِّكَ عَلَى ٱلَّذِينَ فَسَقُوٓا۟ أَنَّهُمْ لَا يُؤْمِنُونَ

Thus the word [i.e., decree] of your Lord has come into effect upon those who defiantly disobeyed - that they will not believe.