Sura 42 Ash-Shura (The Consultation), aya 41

1. وَلَمَنِ انْتَصَرَ بَعْدَ ظُلْمِهِ فَأُولَٰئِكَ مَا عَلَيْهِمْ مِنْ سَبِيلٍ

   And whoever avenges himself after having been wronged - those have not upon them any cause (for blame).

   42:41

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