25 "If your brother becomes poor and sells part of his property, then his nearest redeemer shall come and redeem what his brother has sold. 26 If a man has no one to redeem it and then himself becomes prosperous and finds sufficient means to redeem it, 27 let him calculate the years since he sold it and pay back the balance to the man to whom he sold it, and then return to his property. 28 But if he has not sufficient means to recover it, then what he sold shall remain in the hand of the buyer until the year of jubilee. In the jubilee it shall be released, and he shall return to his property. 29 "If a man sells a dwelling house in a walled city, he may redeem it within a year of its sale. For a full year he shall have the right of redemption. 30 If it is not redeemed within a full year, then the house in the walled city shall belong in perpetuity to the buyer, throughout his generations; it shall not be released in the jubilee.

Matthew Henry's Commentary on Leviticus 25:25-30

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.