31 But the houses of the villages that have no wall around them shall be classified with the fields of the land. They may be redeemed, and they shall be released in the jubilee. 32 As for the cities of the Levites, the Levites may redeem at any time the houses in the cities they possess. 33 And if one of the Levites exercises his right of redemption, then the house that was sold in a city they possess shall be released in the jubilee. For the houses in the cities of the Levites are their possession among the people of Israel. 34 But the fields of pastureland belonging to their cities may not be sold, for that is their possession forever.

Matthew Henry's Commentary on Leviticus 25:31-34

Commentary on Leviticus 25:23-34

(Read Leviticus 25:23-34)

If the land were not redeemed before the year of jubilee, it then returned to him that sold or mortgaged it. This was a figure of the free grace of God in Christ; by which, and not by any price or merit of our own, we are restored to the favour of God. Houses in walled cities were more the fruits of their own industry than land in the country, which was the direct gift of God's bounty; therefore if a man sold a house in a city, he might redeem it only within a year after the sale. This encouraged strangers and proselytes to come and settle among them.