Deuteronomy 19:2-4

Names of God Bible

² When all this is done, set aside three cities in the land that Yahweh your Elohim is giving you. ³ Provide a route to each of these cities and divide the land that Yahweh your Elohim is giving you into three regions. Whoever kills someone may run to one of these cities.

⁴ A person who unintentionally kills someone he never hated in the past may run to one of these cities to save his life.