Quran Al-Baqarah 2:194
ٱلشَّهۡرُ ٱلۡحَرَامُ بِٱلشَّهۡرِ ٱلۡحَرَامِ وَٱلۡحُرُمَٰتُ قِصَاصٞۚ فَمَنِ ٱعۡتَدَىٰ عَلَيۡكُمۡ فَٱعۡتَدُواْ عَلَيۡهِ بِمِثۡلِ مَا ٱعۡتَدَىٰ عَلَيۡكُمۡۚ وَٱتَّقُواْ ٱللَّهَ وَٱعۡلَمُوٓاْ أَنَّ ٱللَّهَ مَعَ ٱلۡمُتَّقِينَ ١٩٤
Translation
[Battle in] the sacred month is for [aggression committed in] the sacred month, and for [all] violations is legal retribution. So whoever has assaulted you, then assault him in the same way that he has assaulted you. And fear Allāh and know that Allāh is with those who fear Him.