Leviticus 25:14-17

If you sell anything to your friend or buy from your friend, you shall not wrong one another. According to the number of years after the Jubilee, you shall buy from your friend. And he is to sell to you according to the number of years of crops [which may be harvested before you must restore the property to him]. If the years [until the next Jubilee] are many, you shall increase the price, but if the years remaining are few, you shall reduce the price, because it is the number of crops that he is selling to you. You shall not wrong one another, but you shall fear your God [with profound reverence]; for I am the LORD your God.