3 Preface ذٰلِكَ بِأَنَّهُم آمَنوا ثُمَّ كَفَروا فَطُبِعَ عَلىٰ قُلوبِهِم فَهُم لا يَفقَهونَAli Quli QaraiThat is because they believed and then disbelieved, so their hearts were sealed. Hence they do not understand.