Leviticus 27:18

18 If you dedicate it any time later, the priest shall estimate the cash value according to the number of years left until the next Year of Restoration, and set a reduced price.

Leviticus 27:18 In-Context

16 If any of you dedicate part of your land to the Lord, the price shall be set according to the amount of seed it takes to sow it, at the rate of ten pieces of silver per bushel of barley.
17 If you dedicate the land immediately after a Year of Restoration, the full price applies.
18 If you dedicate it any time later, the priest shall estimate the cash value according to the number of years left until the next Year of Restoration, and set a reduced price.
19 If you wish to buy your field back, you must pay the price plus an additional 20 percent.
20 If you sell the field to someone else without first buying it back from the Lord, you lose the right to buy it back.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.