Leviticus 27:15-19

¹⁵And if the owner has a desire to get back his house, let him give a fifth more than your value, and it will be his.

¹⁶And if a man gives to the Lord part of the field which is his property, then let your value be in relation to the seed which is planted in it; a measure of barley grain will be valued at fifty shekels of silver.

¹⁷If he gives his field from the year of Jubilee, the value will be fixed by your decision.

¹⁸But if he gives his field after the year of Jubilee, the amount of the money will be worked out by the priest in relation to the number of years till the coming year of Jubilee, and the necessary amount will be taken off your value.

¹⁹And if the man who has given the field has a desire to get it back, let him give a fifth more than the price at which it was valued and it will be his.