Deuteronomy 19:6-8

Good News Translation

⁶ If there were only one city, the distance to it might be too great, and the relative who is responsible for taking revenge for the killing might catch you and angrily kill an innocent person. After all, it was by accident that you killed someone who was not your enemy. ⁷ This is why I order you to set aside three cities.

⁸ “When the Lord your God enlarges your territory, as he told your ancestors he would, and gives you all the land he has promised,