Thematic Bible: Suburbs of their cities were inalienable for debt

Nevertheless the cities of the Levites, and the houses of the cities of their possession, may the Levites redeem at any time. And if a man purchases a house from the Levites, then the house that was sold, and the city of his possession, shall be released in the year of jubilee: for the houses of the cities of the Levites are their possession among the children of Israel. But the field of the common lands of their cities may not be sold; for it is their perpetual possession.