It is not for a believer to slay a believer except by a mischance ; and whosoever slayeth a believer by mischance on him is the setting free of a believing bondman and blood-wit to be delivered to his family except that they forego . Then if he be of a people hostile unto you and is himself a believer , then the setting free of a believing bondman ; and if he be of a people between man whom and you is a bond , then the bloodwit to be delivered to his family and the setting free of a believing bondman .