Leviticus 27:18-20 Easy-to-Read Version (ERV)
18 But if you give your field after the Jubilee, the priest must decide its exact price. He must count the number of years to the next year of Jubilee and use that number to decide the price. 19 If you want to buy the field back, you must add one-fifth to that price. Then you will get the field back. 20 If you don’t buy the field back and the land is sold to someone else, you cannot get the land back.