Leviticus 27:9-19

9 If your vow concerns an animal that is acceptable as an offering to the Lord, then every gift made to the Lord is sacred,
10 and you may not substitute another animal for it. If you do, both animals belong to the Lord.
11 But if your vow concerns a ritually unclean animal, which is not acceptable as an offering to the Lord, you shall take the animal to the priest.
12 The priest shall set a price for it, according to its good or bad qualities, and the price will be final.
13 If you wish to buy it back, you must pay the price plus an additional 20 percent.
14 When any of you dedicate your house to the Lord, the priest shall set the price according to its good or bad points, and the price will be final.
15 If you wish to buy your house back, you must pay the price plus an additional 20 percent.
16 If any of you dedicate part of your land to the Lord, the price shall be set according to the amount of seed it takes to sow it, at the rate of ten pieces of silver per bushel of barley.
17 If you dedicate the land immediately after a Year of Restoration, the full price applies.
18 If you dedicate it any time later, the priest shall estimate the cash value according to the number of years left until the next Year of Restoration, and set a reduced price.
19 If you wish to buy your field back, you must pay the price plus an additional 20 percent.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.