Al-Isra 17:33

Wala taqtuloo annafsa allateeharrama Allahu illa bilhaqqiwaman qutila mathlooman faqad jaAAalnaliwaliyyihi sultanan fala yusrif fee alqatli innahukana mansoora

And do not kill the soul [i.e., person] which Allāh has forbidden, except by right. And whoever is killed unjustly - We have given his heir authority, but let him not exceed limits in [the matter of] taking life. Indeed, he has been supported [by the law].

Do not kill any person the life of whom is sanctified by Allah, except for a just reason. And whoever is killed unjustly, We have invested his heir with authority (of equal retaliation), but he must not cross the limit in the matter of killing. Surely, he will be helped.