Leviticus 20:25

King James 3 - The Literal Traslation

And you shall make a difference between the clean animals and the unclean, and between the unclean fowl and the clean. And you shall not defile yourself by beast or by fowl, or by anything which swarms the ground, which I have set apart to you as unclean;

Cross References

Genesis 1:21

And God created the great sea monsters, and all that moves, having a living body, which abounds the waters, according to its kind; and every bird with wing according to its kind. And God saw that it was good.

Leviticus 10:10

and to make a distinction between the holy and profane, and between the unclean and the clean;

Acts 10:28

And he said to them, You know how unlawful it is for a man, a Jew, to unite with or to come near to one of another nation. Yet God showed to me not to call a man, not one, common or unclean.