Deuteronomy 21:8-9

DouayRheims(i) 8 Be merciful to thy people Israel, whom thou hast redeemed, O Lord, and lay not innocent blood to their charge, in the midst of thy people Israel. And the guilt of blood shall be taken from them: 9 And thou shalt be free from the innocent's blood, that was shed, when thou shalt have done what the Lord hath commanded thee.