"Throughout the land of your possession, you shall give redemption for the land"—Leviticus 25:24.
During the Jubilee Year, all acquired land must be returned – free of charge – to its original owner, as explained in the Torah.
This mitzvah applies only to real estate that is not within a walled city, and is only practiced in the Land of Israel, and only when all of the tribes are settled therein, each in their ancestral portion of the Land.
"The land shall not be sold forever"—Leviticus 25:23.
It is forbidden to sell real estate in the Land of Israel for perpetuity. [Instead, land must be sold with the understanding that it will return to its original owner during the Jubilee Year.]
"And if a man sells a dwelling house in a walled city..."—Leviticus 25:29.
Properties within a walled city in the Land of Israel [walled since the times of Joshua] can be redeemed (i.e. repurchased) by the seller for an entire year following the sale. If the seller did not redeem the property within that window of time, the sold property remains permanently in the property of the buyer—it does not revert to the seller during the Jubilee Year.
