Leviticus 27:9-15

‘If it is an animal that men may bring as an offering to the LORD, all that anyone gives to the LORD shall be holy. He shall not substitute it or exchange it, good for bad or bad for good; and if he at all exchanges animal for animal, then both it and the one exchanged for it shall be holy. If it is an unclean animal which they do not offer as a sacrifice to the LORD, then he shall present the animal before the priest; and the priest shall set a value for it, whether it is good or bad; as you, the priest, value it, so it shall be. But if he wants at all to redeem it, then he must add one-fifth to your valuation. ‘And when a man dedicates his house to be holy to the LORD, then the priest shall set a value for it, whether it is good or bad; as the priest values it, so it shall stand. If he who dedicated it wants to redeem his house, then he must add one-fifth of the money of your valuation to it, and it shall be his.