An-Nisa 4:155

Fabima naqdihim meethaqahumwakufrihim bi-ayati Allahi waqatlihimual-anbiyaa bighayri haqqin waqawlihim quloobunaghulfun bal tabaAAa Allahu AAalayhabikufrihim fala yu/minoona illa qaleela

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

So, (they met their fate) for breaking their pledge, and for their disbelief in the verses of Allah, and for their slaying of the prophets unjustly, and for their saying, “Our hearts are sealed” - rather, Allah has set a seal over them for their disbelief, so they do not believe but a little