Deuteronomy 21:9 KJV
So shalt thou put away the guilt of innocent blood from among you, when thou shalt do that which is right in the sight of the Lord.
Deuteronomy 21:9, King James Version
In context
8 Be merciful, O Lord, unto thy people Israel, whom thou hast redeemed, and lay not innocent blood unto thy people of Israel’s charge. And the blood shall be forgiven them.
9 So shalt thou put away the guilt of innocent blood from among you, when thou shalt do that which is right in the sight of the Lord.
10 When thou goest forth to war against thine enemies, and the Lord thy God hath delivered them into thine hands, and thou hast taken them captive,