Leviticus 20:25-26

²⁵“‘You shall therefore make a distinction between the clean animal and the unclean, and between the unclean fowl and the clean. You shall not make yourselves abominable by animal, or by bird, or by anything with which the ground teems, which I have separated from you as unclean for you.

²⁶You shall be holy to me, for I, the LORD, am holy, and have set you apart from the peoples, that you should be mine.