Deuteronomy 19:2-4

The Voice

^2-3 then designate three cities of refuge for yourselves in the land He is giving you to live in. Divide your territory into three parts, locate one city centrally in each part, and measure the roads to each of them. That way a person who kills someone accidentally can escape to one of these cities and be safe from revenge.

⁴ This is the kind of person I’m talking about: someone who kills a friend unintentionally, when there was no grudge between them,