﴿ فَبِمَا نَقْضِهِم مِّيثَٰقَهُمْ وَكُفْرِهِم بِـَٔايَٰتِ ٱللَّهِ وَقَتْلِهِمُ ٱلْأَنۢبِيَآءَ بِغَيْرِ حَقٍّۢ وَقَوْلِهِمْ قُلُوبُنَا غُلْفٌۢ ۚ بَلْ طَبَعَ ٱللَّهُ عَلَيْهَا بِكُفْرِهِمْ فَلَا يُؤْمِنُونَ إِلَّا قَلِيلًۭا ﴾

“And so, [We punished them] for the break­ing of their pledge, and their refusal to acknowledge God's messages, and their slaying of prophets against all right, and their boast, "Our hearts are already full of knowledge"- nay, but God has sealed their hearts in result of their denial of the truth, and [now] they believe in but few things -;”

The Jews had Scriptures revealed to them in which they were asked to surrender to the will of God in this world, in return for which God would grant them Paradise in the next. They forgot the first part and came to regard the second part as their birthright. All kinds of rot set in among the Jewish community. Moreover, they were so greatly convinced of the notion that salvation was their birthright that they considered it unnecessary to acknowledge the new Prophet. They would say ironically, ‘Our hearts are sealed.’ This not only showed their inability to acknowledge the new Prophet, but also their conviction that, whatever their misconduct with the Prophet, their salvation was not going to be endangered.