Deuteronomy 21:2

New Living Translation

In such a case, your elders and judges must measure the distance from the site of the crime to the nearby towns.

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“When you are in the land the Lord your God is giving you, someone may be found murdered in a field, and you don’t know who committed the murder.

When the nearest town has been determined, that town’s elders must select from the herd a heifer that has never been trained or yoked to a plow.