Leviticus 27:16-18

16“If a man consecrates to the Lord any part of a field that he possesses, your assessment of value will be proportional to the seed needed to sow it, at the rate of fifty silver shekels for every six bushels of barley seed.

17If he consecrates his field during the Year of Jubilee, the price will stand according to your assessment.

18But if he consecrates his field after the Jubilee, the priest will calculate the price for him in proportion to the years left until the next Year of Jubilee, so that your assessment will be reduced.