Leviticus 25:27, 51-52

he then has the right to redeem it from the one who bought it. The price of the land will be discounted according to the number of years until the next Year of Jubilee. In this way the original owner can then return to the land.

If many years still remain until the jubilee, they will repay the proper proportion of what they received when they sold themselves. If only a few years remain until the Year of Jubilee, they will repay a small amount for their redemption.