63:3
ذٰلِكَ بِاَنَّهُمْ اٰمَنُوا ثُمَّ كَفَرُوا فَطُبِعَ عَلٰى قُلُوبِهِمْ فَهُمْ لَا یَفْقَهُونَ
Thalika biannahum amanoo thumma kafaroo fatubiAAa AAala quloobihim fahum la yafqahoona
Translations
That is because they believed, and then they disbelieved; so their hearts were sealed over, and they do not understand
Saheeh International
That is because they believed, then disbelieved, therefore their hearts are sealed so that they understand not
Marmaduke Pickthall