The Holy Quran 3:63 — Surah Ali 'Imran

Arabic text

فَإِن تَوَلَّوْا۟ فَإِنَّ ٱللَّهَ عَلِيمٌۢ بِٱلْمُفْسِدِينَ

Translation

If they turn away (from Imaan), then without doubt Allaah is Aware of those who cause corruption (and He shall punish them for their sins).

Tafsir (excerpt) — Tafsir Usmani

if they neither accept the proofs nor agree to the mubahalah (mutual invocation of Allah’s curse), then understand that establishing the truth is not their aim, nor do they have in their hearts any confidence in the truth of their beliefs; their only object is to spread discord and mischief.

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