Leviticus 27:9-13 - Redemption Of Vowed Animals

⁹ " 'And if [it is] a domestic animal from which they present an offering for Yahweh, all that he gives from it for Yahweh shall be a holy object. ¹⁰ He shall not replace it, nor shall he exchange it, [either] good with bad or bad with good; and if he indeed exchanges a domestic animal with a domestic animal, then {it and its substitution shall be a holy object}.

¹¹ But if [it is] any unclean animal from which they may not present an offering for Yahweh, then he shall present the animal {before} the priest. ¹² And the priest shall set a value on it, {either good or bad}; as the priest [sets] your proper value, so it shall be. ¹³ And if he indeed wants to redeem it, then he shall add a fifth of it onto your proper value.