Leviticus 25:14-16

14And if thou sell aught unto thy neighbor, or buy of thy neighbor’s hand, ye shall not wrong one another. 15According to the number of years after the jubilee thou shalt buy of thy neighbor, and according unto the number of years of the crops he shall sell unto thee. 16According to the multitude of the years thou shalt increase the price thereof, and according to the fewness of the years thou shalt diminish the price of it; for the number of the crops doth he sell unto thee.