63:3
ذَٰلِكَبِأَنَّهُمْءَامَنُوا۟ثُمَّكَفَرُوا۟فَطُبِعَعَلَىٰقُلُوبِهِمْفَهُمْلَايَفْقَهُونَ٣
dhālika bi-annahum āmanū thumma kafarū faṭubiʿa ʿalā qulūbihim fahum lā yafqahūna
That is because they believed, and then they disbelieved; so their hearts were sealed over, and they do not understand.(3)