Leviticus 25:14-16

When thou shalt sell any thing to thy neighbour, or shalt buy of him: grieve not thy brother. But thou shalt buy of him according to the number of years from the jubilee.

And he shall sell to thee according to the computation of the fruits.

The more years remain after the jubilee, the more shall the price increase: and the less time is counted, so much the less shall the purchase cost. For he shall sell to thee the time of the fruits.