Quran 9:87 from Surah At-Tawba on Divine Marvels.
رَضُواْ بِأَن يَكُونُواْ مَعَ ٱلۡخَوَالِفِ وَطُبِعَ عَلَىٰ قُلُوبِهِمۡ فَهُمۡ لَا يَفۡقَهُونَ
English translation: They (were) satisfied to be with those who stay behind and were sealed [on] their hearts so they (do) not understand
Transliteration: radu bi-an yakunu ma'a al-khawalifi watubi'a ala qulubihim fahum la yafqahuna