Leviticus 27:30-33 - Redemption Of The Tithe
30 And all tithe of the land, of the seed of the land, of the fruit of the tree, is Jehovah's -- holy to Jehovah. 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.'