And [We cursed them] for their breaking of the covenant and their (4:155)

﴿فَبِمَا نَقْضِهِم مِّيثَاقَهُمْ وَكُفْرِهِم بِآيَاتِ اللَّهِ وَقَتْلِهِمُ الْأَنبِيَاءَ بِغَيْرِ حَقٍّ وَقَوْلِهِمْ قُلُوبُنَا غُلْفٌ ۚ بَلْ طَبَعَ اللَّهُ عَلَيْهَا بِكُفْرِهِمْ فَلَا يُؤْمِنُونَ إِلَّا قَلِيلًا﴾
[ النساء: 155]

4:155 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.

I distanced them from My mercy because they broke the promise that was taken from them, disbelieved in Allah’s words, boldly killed the prophets and said to Muhammad ( peace be upon him ), 'Our hearts are covered, so we cannot understand what you say’ That is not the case.
Instead, Allah has sealed their hearts so no good reaches them.
They only have a little faith, which will not be of any use to them.

Because of their breaking the covenant, and of their rejecting the Ayat (proofs, evidences, verses, lessons, signs, revelations, etc.) of Allah, and of their killing the Prophets unjustly, and of their saying: "Our hearts are wrapped (with coverings, i.e. we do not understand what the Messengers say)" - nay, Allah has set a seal upon their hearts because of their disbelief, so they believe not but a little.

phonetic Transliteration

Fabima naqdihim meethaqahum wakufrihim biayati Allahi waqatlihimu alanbiyaa bighayri haqqin waqawlihim quloobuna ghulfun bal tabaAAa Allahu AAalayha bikufrihim fala yuminoona illa qaleelan

Abdullah Yusuf Ali - Translation

(They have incurred divine displeasure): In that they broke their covenant; that they rejected the signs of Allah; that they slew the Messengers in defiance of right; that they said, "Our hearts are the wrappings (which preserve Allah's Word; We need no more)";- Nay, Allah hath set the seal on their hearts for their blasphemy, and little is it they believe;-

Safi-ur-Rahman al-Mubarakpuri

Because of their breaking the covenant, and their rejecting the Ayat of Allah, and their killing the Prophets unjustly, and their saying: "Our hearts are Ghulf," nay, Allah has set a seal upon their hearts because of their disbelief, so they believe not but a little.

Page 103 English transliteration