Leviticus 27:23-25 King James Version (KJV)

23. Then the priest shall reckon unto him the worth of thy estimation, even unto the year of the jubilee: and he shall give thine estimation in that day, as a holy thing unto the Lord.

24. In the year of the jubilee the field shall return unto him of whom it was bought, even to him to whom the possession of the land did belong.

25. And all thy estimations shall be according to the shekel of the sanctuary: twenty gerahs shall be the shekel.

Leviticus 27