Deuteronomy 21:4-6

World English Bible

⁴ 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 The priests the sons of Levi shall come near, for them Yahweh your God has chosen to minister to him, and to bless in Yahweh’s name; and according to their word shall every controversy and every assault be decided. ⁶ All the elders of that city which is nearest to the slain man shall wash their hands over the heifer whose neck was broken in the valley.