Leviticus 25:32-34

32“Concerning the Levitical cities, the Levites always have the right to redeem houses in the cities they possess.

33Whatever property one of the Levites can redeem  — a house sold in a city they possess — is to be released at the Jubilee, because the houses in the Levitical cities are their possession among the Israelites.

34The open pastureland around their cities may not be sold, for it is their permanent possession.