Qur'an 63:3

ذَٰلِكَ بِأَنَّهُمْ ءَامَنُوا۟ ثُمَّ كَفَرُوا۟ فَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

“That is because they believed, and then they disbelieved; so their hearts were sealed over, and they do not understand.”

Al-Munaafiqoon 63:3 · Saheeh International