Leviticus 25:32
Notwithstanding the cities of the Levites, and the houses of the cities of their possession, may the Levites redeem at any time.
Leviticus 25:33
And if a man purchase of the Levites, then the house that was sold, and the city of his possession, shall go out in the year of jubilee: for the houses of the cities of the Levites are their possession among the children of Israel.