Leviticus 27:32 in the King James Version
And concerning the tithe of the herd, or of the flock, even of whatsoever passeth under the rod, the tenth shall be holy unto the LORD.
Context
31 If a man redeems anything of his tithe, he shall add a fifth part to it.
32 All the tithe of the herds or the flocks, whatever passes under the rod, the tenth shall be holy to the LORD.
33 He shall not examine whether it is good or bad, neither shall he exchange it. If he exchanges it at all, then both it and that for which it is exchanged shall be holy. It shall not be redeemed.’”