Deuteronomy 21
6 Ref All the elders of that city, who are nearest to 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, Yahweh, your people Israel, whom you have redeemed, and don't allow innocent blood [to remain] in the midst of your people Israel. The blood shall be forgiven them.
9 Ref So shall you put away the innocent blood from the midst of you, when you shall do that which is right in the eyes of Yahweh.