Leviticus 25:32-34

32As for the cities of the Levites, the Levites always have the right to redeem their houses in the cities they possess. 33So whatever belongs to the Levites may be redeemed—a house sold in a city they possess—and must be released in the Jubilee, because the houses in the cities of the Levites are their possession among the Israelites. 34But the open pastureland around their cities may not be sold, for this is their permanent possession.