Leviticus 27:31-33

International Standard Version

³¹ But if a person wishes to redeem his tithe, he is to add a fifth to it. ³² All the tithes from cattle and flocks that pass under the measuring rod are sacred to the Lord. ³³ He is not to examine it to see if it’s good or bad or even exchange it. If he does exchange it, what has been exchanged as well as its substitute^[a] is sacred. It is not to be redeemed.”