Deuteronomy
Chapters 21:1-5
Amplified Bible
1IF ONE is found slain in the land which the Lord your God gives you to possess, lying in the field, and it is not known who has killed him,
2Then your elders and judges shall come forth and measure the distance to the cities around him who is slain.
3And the city which is nearest to the slain man, the elders of that city shall take a heifer which has never been worked, never pulled in the yoke,
4And 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.
5And the priests, the sons of Levi, shall come near, for the Lord your God has chosen them to minister to Him and to bless in the name [and presence] of the Lord, and by their word shall every controversy and every assault be settled.