Quran 30:60 — The Romans (Al-Room)

فَاصبِر إِنَّ وَعدَ اللَّهِ حَقٌّ ۖ وَلا يَستَخِفَّنَّكَ الَّذينَ لا يوقِنونَ

Therefore, you shall steadfastly persevere—for GOD's promise is the truth—and do not be intimidated by those who have not attained certainty.

[30:59] GOD thus seals the hearts of those who do not know.