And do not kill the soul [i.e., person] which Allāh has forbidden, except by right.1 And whoever is killed unjustly - We have given his heir authority,2 but let him not exceed limits in [the matter of] taking life. Indeed, he has been supported [by the law].
Do not kill the soul whose life Allah has protected through faith or a pledge of security, except if the killing is merited on the basis of treason or legal retribution. If someone is killed unjustly, without a valid reason permitting his being killed, I have given his successor who takes charge of his affairs certain authority over the killer. He may demand that the killer be killed in retribution, or he may forgive him without asking for any thing in return, or he may forgive him and take the blood money. But he shall not mutilate the killer, or by killing him with something that he did not use to kill, or by killing someone other than the killer, even if he was a helper and supporter.