فَأَعقَبَهُم نِفاقًا في قُلوبِهِم إِلىٰ يَومِ يَلقَونَهُ بِما أَخلَفُوا اللَّهَ ما وَعَدوهُ وَبِما كانوا يَكذِبونَ

So He penalized them with hypocrisy in their hearts until the Day they will meet Him - because they failed Allah in what they promised Him and because they [habitually] used to lie.