وَلا تَقتُلُوا النَّفسَ الَّتي حَرَّمَ اللَّهُ إِلّا بِالحَقِّ ۗ وَمَن قُتِلَ مَظلومًا فَقَد جَعَلنا لِوَلِيِّهِ سُلطانًا فَلا يُسرِف فِي القَتلِ ۖ إِنَّهُ كانَ مَنصورًا

Don’t take a life that God deemed sacred, except in the course of justice. If someone is killed unjustly, We’ve given his heir authority, but he must not take life excessively; he will be assisted.