﴿ وَنُقَلِّبُ أَفْـِٔدَتَهُمْ وَأَبْصَٰرَهُمْ كَمَا لَمْ يُؤْمِنُوا۟ بِهِۦٓ أَوَّلَ مَرَّةٍۢ وَنَذَرُهُمْ فِى طُغْيَٰنِهِمْ يَعْمَهُونَ ﴾

“so long as We keep their hearts and their eyes turned [away from the truth], even as they did not believe in it in the first instance: and [so] We shall leave them in their overweening arrogance, blindly stumbling to and fro.”

(We confound their hearts and their eyes) upon the revelation of the sign such that they do not believe in it. (As they believed not therein) just as they did not believe in that which the Prophet (pbuh) informed them about the sign (at the first) before this, (We let them wander) We leave them (blindly on in their contumacy) in their disbelief and error.