Leviticus 27:10 in the King James Version
He shall not alter it, nor change it, a good for a bad, or a bad for a good: and if he shall at all change beast for beast, then it and the exchange thereof shall be holy.
Context
9 “‘If it is an animal of which men offer an offering to the LORD, all that any man gives of such to the LORD becomes holy.
10 He shall not alter it, nor exchange it, a good for a bad, or a bad for a good. If he shall at all exchange animal for animal, then both it and that for which it is exchanged shall be holy.
11 If it is any unclean animal, of which they do not offer as an offering to the LORD, then he shall set the animal before the priest;