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.
“Cursed is the cheat who has an acceptable male in his flock and vows to give it, but then sacrifices a blemished animal to the Lord. For I am a great king,” says the Lord Almighty, “and my name is to be feared among the nations.
You must not bring the earnings of a female prostitute or of a male prostitute into the house of the Lord your God to pay any vow, because the Lord your God detests them both.