Leviticus 27:16-18

16“ ‘If anyone dedicates to the Lord part of their family land, its value is to be set according to the amount of seed required for it—fifty shekels of silver to a homer of barley seed.

17If they dedicate a field during the Year of Jubilee, the value that has been set remains.

18But if they dedicate a field after the Jubilee, the priest will determine the value according to the number of years that remain until the next Year of Jubilee, and its set value will be reduced.