Leviticus 27:25-34

25 And all thy valuation is by the shekel of the sanctuary: twenty gerahs is the shekel.
26 `Only, a firstling which is Jehovah's firstling among beasts -- no man doth sanctify it, whether ox or sheep; it [is] Jehovah's.
27 And if among the unclean beasts, then he hath ransomed [it] at thy valuation, and he hath added its fifth to it; and if it is not redeemed, then it hath been sold at thy valuation.
28 `Only, no devoted thing which a man devoteth to Jehovah, of all that he hath, of man, and beast, and of the field of his possession, is sold or redeemed; every devoted thing is most holy to Jehovah.
29 `No devoted thing, which is devoted of man, is ransomed, it is surely put to death.
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.'
34 These [are] the commands which Jehovah hath commanded Moses for the sons of Israel, in mount Sinai.