If you eat any of them, you will become just as disgusting and unclean as they are.
God said, “I command the sea to be full of living creatures, and I command birds to fly above the earth.”
Not a bird, animal, reptile, or human was left alive anywhere on earth.
That's why you must make a difference between animals and birds that I have said are clean and unclean—this will keep you from becoming disgusting to me.
or if you have touched an unclean creature of any sort, including an unclean person.