Leviticus 11:43-47

⁴³You are not to make yourselves disgusting with anything which goes about flat on the earth; you may not make yourselves unclean with them, in such a way that you are not holy to me.

⁴⁴For I am the Lord your God: for this reason, make and keep yourselves holy, for I am holy; you are not to make yourselves unclean with any sort of thing which goes about flat on the earth.

⁴⁵For I am the Lord, who took you out of the land of Egypt, to be your God; so be you holy, for I am holy.

⁴⁶This is the law about beasts and birds and every living thing moving in the waters, and every living thing which goes flat on the earth:

⁴⁷Marking out the unclean from the clean, and the living thing which may be used for food from that which may not.