Surah Al-Munafiqun (63:3)
ذَٰلِكَ بِأَنَّهُمْ ءَامَنُوا۟ ثُمَّ كَفَرُوا۟ فَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ
That is because they trusted, then covered [the truth], so a seal was set upon their hearts, and thus they do not comprehend.
Roots in this verse: ا م ن (Amn), ك ف ر (kfr), ط ب ع (TbE), ق ل ب (qlb), ف ق ه (fqh)