Leviticus 27:18-23
18 But if he dedicates his field after the Jubilee, the priest will determine the value according to the number of years that remain until the next Year of Jubilee, and its set value will be reduced.
19 If the man who dedicates the field wishes to redeem it, he must add a fifth to its value, and the field will again become his.
20 If, however, he does not redeem the field, or if he has sold it to someone else, it can never be redeemed.
21 When the field is released in the Jubilee, it will become holy, like a field devoted to the Lord; it will become the property of the priests.
22 “‘If a man dedicates to the Lord a field he has bought, which is not part of his family land,
23 the priest will determine its value up to the Year of Jubilee, and the man must pay its value on that day as something holy to the Lord.