Al-Baqarah 2:178

يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ كُتِبَ عَلَيۡكُمُ ٱلۡقِصَاصُ فِي ٱلۡقَتۡلَىۖ ٱلۡحُرُّ بِٱلۡحُرِّ وَٱلۡعَبۡدُ بِٱلۡعَبۡدِ وَٱلۡأُنثَىٰ بِٱلۡأُنثَىٰۚ فَمَنۡ عُفِيَ لَهُۥ مِنۡ أَخِيهِ شَيۡءٞ فَٱتِّبَاعُۢ بِٱلۡمَعۡرُوفِ وَأَدَآءٌ إِلَيۡهِ بِإِحۡسَٰنٖۗ ذَٰلِكَ تَخۡفِيفٞ مِّن رَّبِّكُمۡ وَرَحۡمَةٞۗ فَمَنِ ٱعۡتَدَىٰ بَعۡدَ ذَٰلِكَ فَلَهُۥ عَذَابٌ أَلِيمٞ 178

O you who have believed, prescribed for you is legal retribution for those murdered - the free for the free, the slave for the slave, and the female for the female. But whoever overlooks from his brother anything, then there should be a suitable follow-up and payment to him with good conduct. This is an alleviation from your Lord and a mercy. But whoever transgresses after that will have a painful punishment