Leviticus 27:31-33

Young's Literal Translation

³¹ `And if a man really redeem [any] of his tithe, its fifth he addeth to it.

³² `And all the tithe of the herd and of the flock -- all that passeth by under the rod -- the tenth is holy to Jehovah;

³³ he enquireth not between good and bad, nor doth he change it; and if he really change it -- then it hath been -- it and its exchange is holy; it is not redeemed.'