If thy brother be waxen poor - The Israelites never parted with their land except under the pressure of poverty. Compare the answer of Naboth, 1 Kings 21:3.
Related Commentaries of Leviticus 25:25
Leviticus 25:25
25 If thy brother be waxen poor, and hath sold away some of his possession, and if any of his kin come to redeem it, then shall he redeem that which his brother sold.