The people were to buy and sell property in view of the upcoming year of jubilee since in that year all property would revert to its original tribal leasees. This special year reminded the Israelites that they did not really own the land but were tenants of God, the true owner (v. 23).
"The relationship of land and people under God is of fundamental importance for understanding the Old Testament and the Jewish people. . . . The Promised Land was a gift from God, not an inalienable right of anyone's to sell or incorporate as they wished."289
Only extreme hardship was to force a tenant-owner to release (redeem, v. 24) his land. Moses gave three cases in verses 25, 26-27, and 28 that explain how the people were to do this. A kinsman redeemer could recover the lost property, the seller himself could do so, and the year of jubilee would return it to him. God granted exceptions to the normal rules of release in the cases of property in a walled city (vv. 29-30) and property of the Levites (vv. 32-34).
There are three Old Testament references to the responsibilities of a human kinsman redeemer (Heb. goel) in Israel. Additionally the psalmists and the prophets also referred to Yahweh as Israel's redeemer.
1. When a person sold himself or his property because of economic distress, his nearest kinsman should buy back (redeem) the person or his property if he could afford to do so (25:25).
2. Perhaps an Israelite could not afford to pay the ransom price so that he could keep a first-born unclean animal for his own use. In this case his nearest kinsman could do so for him if he could afford it (27:11-13).
3. When someone killed a person, the victim's kinsman redeemer could take the life of the killer under certain circumstances (Num. 35:10-29).
Bible students often confuse the levirate marriage custom with the kinsman redeemer custom. Levirate marriage involved the marriage of a widow and her husband's brother or nearest relative. This provision existed so God could raise up a male heir who could perpetuate the family line of the widow's former husband (cf. Gen. 38).
