فَأَعْقَبَهُمْ نِفَاقًا فِي قُلُوبِهِمْ إِلَى يَوْمِ يَلْقَوْنَهُ بِمَا أَخْلَفُوا اللَّهَ مَا وَعَدُوهُ وَبِمَا كَانُوا يَكْذِبُونَ

So He caused hypocrisy to ensue in their hearts until the day they will encounter Him, because of their going back on what they had promised Allah and because of the lies they used to tell.