Leviticus 27:18 in the King James Version
But if he sanctify his field after the jubile, then the priest shall reckon unto him the money according to the years that remain, even unto the year of the jubile, and it shall be abated from thy estimation.
Context
17 If he dedicates his field from the Year of Jubilee, according to your valuation it shall stand.
18 But if he dedicates his field after the Jubilee, then the priest shall reckon to him the money according to the years that remain to the Year of Jubilee; and an abatement shall be made from your valuation.
19 If he who dedicated the field will indeed redeem it, then he shall add the fifth part of the money of your valuation to it, and it shall remain his.