At-Tawbah 9:87

رَضُوا۟ بِأَن يَكُونُوا۟ مَعَ ٱلْخَوَالِفِ وَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

Raḍū bi-an yakūnū maʿa l-khawālifi waṭubiʿa ʿalā qulūbihim fahum lā yafqahūna

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