Deuteronomy 21:7

4 and the elders of that city shall bring down the heifer unto an ever-flowing watercourse, which is not tilled, nor is it sown, and shall break the heifer's neck there in the watercourse;

5 and the priests the sons of Levi shall come near; for them Jehovah thy God hath chosen to do service unto him, and to bless in the name of Jehovah; and according to their word shall be every controversy and every stroke.

6 And all the elders of that city, that are nearest unto him that is slain, shall wash their hands over the heifer whose neck is broken in the watercourse,

7 and shall answer and say, Our hands have not shed this blood, neither have our eyes seen it.

8 Forgive thy people Israel, whom thou, Jehovah, hast redeemed, and lay not innocent blood to the charge of thy people Israel; and the blood shall be expiated for them.

9 So shalt thou put away innocent blood from thy midst, when thou shalt do what is right in the eyes of Jehovah.

10 When thou goest forth to war against thine enemies, and Jehovah thy God delivereth them into thy hands, and thou hast taken captives of them,