'Cities of the Levites' in the Bible

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

And if one of the Levites redeem, 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 children of Israel.

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