Deuteronomy 21
6 Ref And all the elders of that city, who are nearest unto the slain man, shall wash their hands over the heifer whose neck was broken in the valley;
7 Ref and they shall answer and say, Our hands have not shed this blood, neither have our eyes seen it.
8 Ref Forgive, O Jehovah, thy people Israel, whom thou hast redeemed, and suffer not innocent blood `to remain' in the midst of thy people Israel. And the blood shall be forgiven them.
9 Ref So shalt thou put away the innocent blood from the midst of thee, when thou shalt do that which is right in the eyes of Jehovah.