What man soever of the seed of Aaron is a leper, or hath a running issue; he shall not eat of the holy things, until he be clean. And whoso toucheth any thing that is unclean by the dead, or a man whose seed goeth from him. Leviticus 22:4
He made the serpent crawl on its belly and eat dust.
And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go,
and dust shalt thou eat all the days of thy life. Genesis 3:14