Numbers 35:11

Concerning the cities which you shall give of the possession of the children of Israel, from the many you shall take many, and from the few you shall take few. Everyone according to his inheritance which he inherits shall give some of his cities to the Levites.”

The LORD spoke to Moses, saying,

“Speak to the children of Israel, and tell them, ‘When you pass over the Jordan into the land of Canaan,

The cities shall be for your refuge from the avenger, that the man slayer not die until he stands before the congregation for judgment.

The cities which you shall give shall be for you six cities of refuge.

You shall give three cities beyond the Jordan, and you shall give three cities in the land of Canaan. They shall be cities of refuge.