Deuteronomy 21:1-3

New International Version

Atonement for an Unsolved Murder

21 If someone is found slain, lying in a field in the land the Lord your God is giving you to possess, and it is not known who the killer was,^{(A) 2} your elders and judges shall go out and measure the distance from the body to the neighboring towns. ³ Then the elders of the town nearest the body shall take a heifer that has never been worked and has never worn a yoke^(B)