Leviticus 25:27

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 .

they are to determine the value for the years since they sold it and refund the balance to the one to whom they sold it; they can then go back to their own property.

Then let him count the years of the sale thereof, and restore the overplus unto the man to whom he sold it; that he may return unto his possession.