Leviticus 21:7-8, 23

They shall not take a wife that is a whore, or profane; neither shall they take a woman put away from her husband: for he is holy unto his God. Thou shalt sanctify him therefore; for he offereth the bread of thy God: he shall be holy unto thee: for I the LORD, which sanctify you, am holy.

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.