وَلا تَستَوِي الحَسَنَةُ وَلَا السَّيِّئَةُ ۚ ادفَع بِالَّتي هِيَ أَحسَنُ فَإِذَا الَّذي بَينَكَ وَبَينَهُ عَداوَةٌ كَأَنَّهُ وَلِيٌّ حَميمٌ

And not equal are the good deed and the bad. Repel [evil] by that [deed] which is better; and thereupon the one whom between you and him is enmity [will become] as though he was a devoted friend.