It is not befitting for a believer to kill another believer except (what happens) by mistake; and he who kills a believer by mistake let him set a believing captive of war free and pay blood-money to be handed over to the heirs of the deceased, unless they (- the heirs) forgo it as a free-will offering. But if he (- the slain) is a believer belonging to people hostile to you, then there is still only the (penance of) freeing a believing captive of war; and if he (- the slain) belongs to a people with whom you have a pact, then there is the payment of blood-money, to be handed over to his heirs and (also) the freeing of a believing captive of war; but he who does not find (the means to set free a captive of war,) shall fast two consecutive months, a method of penance (devised) by Allâh. And Allâh is All-Knowing, All-Wise.