Deuteronomy 21:3-5

Darby Translation

³ and the city that is nearest unto him that is slain, even the elders of that city shall take a heifer that hath not been wrought with, that hath not drawn in the yoke;

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.