9:77
فَأَعْقَبَهُمْ نِفَاقًا فِى قُلُوبِهِمْ إِلَىٰ يَوْمِ يَلْقَوْنَهُۥ بِمَآ أَخْلَفُوا۟ ٱللَّهَ مَا وَعَدُوهُ وَبِمَا كَانُوا۟ يَكْذِبُونَ
fa-aʿqabahum nifāqan fī qulūbihim ilā yawmi yalqawnahu bimā akhlafū l-laha mā waʿadūhu wabimā kānū yakdhibūna
Because they broke their promise to God, because of all the lies they told, He made hypocrisy settle in their hearts until the Day they meet Him.
So He punished them by putting hypocrisy into their hearts till the Day whereon they shall meet Him, because they broke that (covenant with Allâh) which they had promised to Him and because they used to tell lies.