إِنَّمَا الْمُؤْمِنُونَ الَّذِينَ إِذَا ذُكِرَ اللَّهُ وَجِلَتْ قُلُوبُهُمْ

The believers are only those who, when Allah is mentioned, their hearts become fearful… (Surah Al-Anfal 8:2)