Leviticus 25:29-30

29“Anyone who sells a house inside a walled town has the right to buy it back for a full year after its sale. During that year, the seller retains the right to buy it back.

30But if it is not bought back within a year, the sale of the house within the walled town cannot be reversed. It will become the permanent property of the buyer. It will not be returned to the original owner in the Year of Jubilee.