فَبِما نَقضِهِم ميثاقَهُم وَكُفرِهِم بِآياتِ اللَّهِ وَقَتلِهِمُ الأَنبِياءَ بِغَيرِ حَقٍّ وَقَولِهِم قُلوبُنا غُلفٌ ۚ بَل طَبَعَ اللَّهُ عَلَيها بِكُفرِهِم فَلا يُؤمِنونَ إِلّا قَليلًا

And [We cursed them] for their breaking of the covenant and their disbelief in the signs of Allah and their killing of the prophets without right and their saying, "Our hearts are wrapped". Rather, Allah has sealed them because of their disbelief, so they believe not, except for a few.