Surah Al-Isra Verse 33 - English Translation by Muhammad Sarwar
Surah Al-Israوَلَا تَقۡتُلُواْ ٱلنَّفۡسَ ٱلَّتِي حَرَّمَ ٱللَّهُ إِلَّا بِٱلۡحَقِّۗ وَمَن قُتِلَ مَظۡلُومٗا فَقَدۡ جَعَلۡنَا لِوَلِيِّهِۦ سُلۡطَٰنٗا فَلَا يُسۡرِف فِّي ٱلۡقَتۡلِۖ إِنَّهُۥ كَانَ مَنصُورٗا
Do not kill a respectable soul without a just cause. If anyone is wrongfully killed, we have given the heirs of that person the right (to demand satisfaction or to forgive). He must not exceed the law in having vengeance; his victim shall also be assisted (by law)