Deuteronomy 19:8-10

New Revised Standard Version, Anglicised Catholic Edition

⁸ If the Lord your God enlarges your territory, as he swore to your ancestors—and he will give you all the land that he promised your ancestors to give you, ⁹ provided you diligently observe this entire commandment that I command you today, by loving the Lord your God and walking always in his ways—then you shall add three more cities to these three, ¹⁰ so that the blood of an innocent person may not be shed in the land that the Lord your God is giving you as an inheritance, thereby bringing blood-guilt upon you.