Leviticus 27:19-21

19If the one who consecrated the field decides to redeem it, he must add a fifth to the assessed value, and the field will transfer back to him.

20But if he does not redeem the field or if he has sold it to another man, it is no longer redeemable.

21When the field is released in the Jubilee, it will be holy to the Lord like a field permanently set apart; it becomes the priest’s property.