Surah Ar-Rum — Ayah 59 (30:59)

English translation (Saheeh International)

Thus does Allāh seal the hearts of those who do not know.¹

1. - i.e., those who do not wish to know the truth and refuse it.

Brief commentary

Allah seals and misguides the heart of those who purposely reject the signs you bring them. Likewise Allah seals the heart of every disbeliever of the truth.