Leviticus 27:16-18

16And if a man shall sanctify unto Jehovah part of the field of his possession, then thy estimation shall be according to the sowing thereof: the sowing of a homer of barley shall be valued at fifty shekels of silver. 17If he sanctify his field from the year of jubilee, according to thy estimation it shall stand. 18But if he sanctify his field after the jubilee, then the priest shall reckon unto him the money according to the years that remain unto the year of jubilee; and an abatement shall be made from thy estimation.