Leviticus 27:19-21

19And if he that hallowed the field will in any wise redeem it, he shall add the fifth of the money of thy valuation unto it, and it shall be assured to him;

20but if he do not redeem the field, or if he sell the field to another man, it cannot be redeemed any more;

21and the field, when it goeth out in the jubilee, shall be holy to Jehovah, as a field devoted; the possession thereof shall be the priest's.