'Cities of the Levites' in the Bible

Nevertheless the cities of the Levites, the houses of the cities of their possession, the Levites may redeem at any time.

And if a man purchases from the Levites, then the house that was sold, and the city of his possession, shall go out in the jubilee. For the houses of the cities of the Levites are their possession among the sons of Israel.

All the cities of the Levites in the midst of the possession of the sons of Israel were forty-eight cities with their suburbs.