وَقالوا قُلوبُنا غُلفٌ ۚ بَل لَعَنَهُمُ اللَّهُ بِكُفرِهِم فَقَليلًا ما يُؤمِنونَ

They say, “Our hearts are sealed.” In fact, God cursed them for their disbelief; they have but little faith.