Deuteronomy 19:3

You shall measure the distances and divide into three parts the area of the land that the Lord your God gives you as a possession , so that any manslayer can flee to them .

Determine the distances involved and divide into three parts the land the Lord your God is giving you as an inheritance, so that a person who kills someone may flee for refuge to one of these cities.

Thou shalt prepare thee a way, and divide the coasts of thy land, which the Lord thy God giveth thee to inherit, into three parts, that every slayer may flee thither.