Leviticus 20:25-26
25‘aYou are therefore to separate between the clean animal and the unclean, and between the unclean bird and the clean; and you shall not make 1yourselves detestable by animal or by bird or by anything 2that creeps on the ground, which I have separated for you as unclean. 26‘Thus you shall be holy to Me, for I Yahweh am holy; and I ahave separated you from the peoples to be Mine.