Ash-Shūra - 41

﴿وَلَمَنِ انْتَصَرَ بَعْدَ ظُلْمِهِ فَأُولَٰئِكَ مَا عَلَيْهِمْ مِنْ سَبِيلٍ﴾

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(41) And whoever retaliates after having been wronged - those have not upon them any cause [for blame].