Wala taqtuloo alnnafsa allatee harrama Allahu illa bialhaqqi waman qutila mathlooman faqad jaAAalna liwaliyyihi sultanan fala yusrif fee alqatli innahu kana mansooran
And do not take a life, which God has forbidden, except in a just cause. We have given the right (of redress) to the heir of the person who is killed, but he should not exceed the limits (of justice) by slaying (the killer), for he will be judged (by the same law).