Leviticus 21:23
Only he shall not go in unto the vail, nor come nigh unto the altar, because he hath a blemish; that he profane not my sanctuaries: for I the LORD do sanctify them.
Leviticus 27:26
Only the firstling of the beasts, which should be the LORD's firstling, no man shall sanctify it; whether it be ox, or sheep: it is the LORD's.