Deuteronomy 21:4-6

Revised Standard Version

⁴ And the elders of that city shall bring the heifer down to a valley with running water, which is neither plowed nor sown, and shall break the heifer’s neck there in the valley. ⁵ And the priests the sons of Levi shall come forward, for the Lord your God has chosen them to minister to him and to bless in the name of the Lord, and by their word every dispute and every assault shall be settled. ⁶ And all the elders of that city nearest to the slain man shall wash their hands over the heifer whose neck was broken in the valley;