The Holy Quran 42:41 — Surah Ash-Shuraa
Arabic text
وَلَمَنِ ٱنتَصَرَ بَعْدَ ظُلْمِهِۦ فَأُو۟لَـٰٓئِكَ مَا عَلَيْهِم مِّن سَبِيلٍ
Translation
(Although forgiving the aggressor is best,) There will be no blame (wrong) on the one who takes revenge (in proportion to the aggression against him) after he has been wronged (because he may exercise his right to retaliate).
Tafsir (excerpt) — Tafsir Usmani
that is, if the wronged person wishes to take retaliation from the wrongdoer, there is no blame or sin in that. Yes, forgiving is more excellent and better.
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