Leviticus 27:31-33

King James Version

³¹ And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof.

³² 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.

³³ He shall not search whether it be good or bad, neither shall he change it: and if he change it at all, then both it and the change thereof shall be holy; it shall not be redeemed.