obeť: All Midianites non-virgin women and boy kids
Moses was not happy that, army brought back the women and kids as prisoners. According God orders, hey suppposed to keep alive only virgin women (16000) for themselfes, nobody else. As they bring more prisoners, those needed to be killed. Moses and army executed the killinds. Men who did killing had to stay outside of camp for 7 days, then come back.