Deuteronomy 21:1-3

New King James Version

The Law Concerning Unsolved Murder

21 “If anyone is found slain, lying in the field in the land which the Lord your God is giving you to possess, and it is not known who killed him, ² then your elders and your judges shall go out and measure the distance from the slain man to the surrounding cities. ³ And it shall be that the elders of the city nearest to the slain man will take a heifer which has not been worked and which has not pulled with a ^(A)yoke.