Al-Munafiqoon · 63:3

ذٰلِكَ بِاَنَّهُمْ اٰمَنُوا ثُمَّ كَفَرُوا فَطُبِعَ عَلٰى قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

because they professed faith and then rejected it, so their hearts have been sealed and they do not understand

Word-by-word analysis is only wired up for the demo verses (1:1 and 1:2) for now.