And a believer would not kill a believer except by mistake. And he who kills a believer by mistake should free a believing slave, and blood-money should be paid to his people unless they remit it as alms. But if he be from a tribe hostile to you and he is a believer, the freeing of a believing slave (suffices). And if he be from a tribe between whom and you there is a covenant, the blood-money should be paid to his people along with the freeing of a believing slave; but he who has not the means should fast for two months successively: a penance from Allah. And Allah is ever Knowing, Wise.