Leviticus 27:18-23

If he consecrates his field after the jubilee, however, then the priest shall calculate the price for him proportionate to the years that are left until the year of jubilee; and it shall be deducted from your assessment. If the one who consecrates it should ever want to redeem the field, then he shall add a fifth of your assessment price to it, so that it may belong to him. Yet if he does not redeem the field, but has sold the field to another person, it may no longer be redeemed; and when it reverts in the jubilee, the field shall be holy to the LORD, like a field banned from secular use; it shall be for the priest as his property. Or if he consecrates to the LORD a field which he has bought, which is not a part of the field of his own property, then the priest shall calculate for him the amount of your assessment up to the year of jubilee; and he shall on that day give your assessment as holy to the LORD.