Leviticus 27:19-21

19And if the one who consecrated the field decides to redeem it, he must add a fifth to the assessed value, and it shall belong to him.

20If, however, he does not redeem the field, or if he has sold it to another man, it may no longer be redeemed. 21When the field is released in the Jubilee, it will become holy, like a field devoted to the LORD; it becomes the property of the priests.