You are therefore to distinguish between clean and unclean animals and birds. Do not become contaminated by any animal or bird, or by anything that crawls on the ground; I have set these apart as unclean for you.

Genesis 1:21
So God created the great sea creatures and every living thing that moves, with which the waters teemed according to their kinds, and every bird of flight after its kind. And God saw that it was good.

Leviticus 10:10
You must distinguish between the holy and the common, between the clean and the unclean,

Leviticus 11:1
The LORD spoke again to Moses and Aaron, telling them,

Leviticus 11:43
Do not defile yourselves by any crawling creature; do not become unclean or defiled by them.

Deuteronomy 14:3
You must not eat any detestable thing.

You shall therefore put difference between clean beasts and unclean, and between unclean fowls and clean: and you shall not make your souls abominable by beast, or by fowl, or by any manner of living thing that creeps on the ground, which I have separated from you as unclean.