Deuteronomy 21:4-6 ▼

4 and the elders of that city shall bring the heifer down to a [river] valley with running water, which has not been plowed or planted, and shall break the heifer’s neck there in the valley.

5 Then the priests, the sons of Levi, shall approach, for the LORD your God has chosen them to serve Him and to bless in the Name (Presence) of the LORD; and every dispute and every assault (violent crime) shall be settled by them.

6 All the elders of that city nearest to the dead man shall wash their hands over the heifer whose neck was broken in the valley;