Deuteronomy 19:9-11

Evangelical Heritage Version

⁹ if you carefully keep this whole set of commands that I am commanding you today, by loving the Lord your God and by walking in his ways always, then add for yourselves three more cities in addition to these three. ¹⁰ Then innocent blood will not be poured out within your land that the Lord your God is giving you as an inheritance, nor will you be guilty of bloodshed.

¹¹ But if there is a person who is hateful toward another, and he lies in ambush for him and springs up on him and strikes him so he dies, and the killer flees to one of the cities of God,