Surah Al-Isra Verse 33 - English Translation by John Medows Rodwell
Surah Al-Israوَلَا تَقۡتُلُواْ ٱلنَّفۡسَ ٱلَّتِي حَرَّمَ ٱللَّهُ إِلَّا بِٱلۡحَقِّۗ وَمَن قُتِلَ مَظۡلُومٗا فَقَدۡ جَعَلۡنَا لِوَلِيِّهِۦ سُلۡطَٰنٗا فَلَا يُسۡرِف فِّي ٱلۡقَتۡلِۖ إِنَّهُۥ كَانَ مَنصُورٗا
Neither slay any one whom God hath forbidden you to slay, unless for a just cause: and whosoever shall be slain wrongfully, to his heir have we given powers; but let him not outstep bounds in putting the manslayer to death, for he too, in his turn, will be assisted and avenged