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