Surah At-Tawbah Verse 87

رَضُوا بِأَنْ يَكُونُوا مَعَ الْخَوَالِفِ وَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

They were satisfied to be with those who stay behind, and their hearts were sealed over, so they do not understand