so allah cursed them because of their constantly breaking their covenant – and they disbelieved in the signs of allah and they used to wrongfully martyr the prophets and because they said our hearts are covered in fact allah has set a seal upon their hearts due to their disbelief so that they do not accept faith except a few.
فبما نقضهم ميثاقهم وكفرهم بآيات الله وقتلهم الأنبياء بغير حق وقولهم قلوبنا غلف بل طبع الله عليها بكفرهم فلا يؤمنون إلا قليلا