The Holy Quran 63:3 — Surah Al-Munafiqun

Arabic text

ذَٰلِكَ بِأَنَّهُمْ ءَامَنُوا۟ ثُمَّ كَفَرُوا۟ فَطُبِعَ عَلَىٰ قُلُوبِهِمْ فَهُمْ لَا يَفْقَهُونَ

Translation

This is because they had accepted Imaan (previously) and then committed kufr (thereby becoming Kuffaar again), so their hearts were sealed (from accepting Imaan again) and (because of this seal) they do not understand (the reality of Imaan).

Tafsir (excerpt) — Tafsir Usmani

The seal on the hearts of the hypocrites: that is, they believed with their tongues but remained deniers in their hearts and, while claiming faith, did deeds like those of the disbelievers. The consequence of this faithlessness and extreme deceit and treachery was that a seal was set on their hearts, leaving absolutely no room in them for faith and…

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