Surah Ash-Shura, ayah 41

وَلَمَنِ ٱنتَصَرَ بَعۡدَ ظُلۡمِهِۦ فَأُوْلَٰٓئِكَ مَا عَلَيۡهِم مِّن سَبِيلٍ ٤١

Walamanintasara ba'da zulmihī fa ulā'ika mā 'alayhim min sabīl

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