Leviticus 27:10

He shall not exchange it or make a substitute for it, good for bad , or bad for good ; and if he does in fact substitute one animal for another , then both it and the substitute shall be holy .

They must not exchange it or substitute a good one for a bad one, or a bad one for a good one; if they should substitute one animal for another, both it and the substitute become holy.

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.