Leviticus 11:33-11:47

And if any of those falls into an earthen vessel, everything inside it shall be unclean and [the vessel] itself you shall break. As to any food that may be eaten, it shall become unclean if it came in contact with water; as to any liquid that may be drunk, it shall become unclean if it was inside any vessel. Everything on which the carcass of any of them falls shall be unclean: an oven or stove shall be smashed. They are unclean and unclean they shall remain for you. However, a spring or cistern in which water is collected shall be clean, but whoever touches such a carcass in it shall be unclean. If such a carcass falls upon seed grain that is to be sown, it is clean; but if water is put on the seed and any part of a carcass falls upon it, it shall be unclean for you. If an animal that you may eat has died, anyone who touches its carcass shall be unclean until evening; anyone who eats of its carcass shall wash his clothes and remain unclean until evening; and anyone who carries its carcass shall wash his clothes and remain unclean until evening. All the things that swarm upon the earth are an abomination; they shall not be eaten. You shall not eat, among all things that swarm upon the earth, anything that crawls on its belly, or anything that walks on fours, or anything that has many legs; for they are an abomination. You shall not draw abomination upon yourselves through anything that swarms; you shall not make yourselves unclean therewith and thus become unclean. For I the Lord am your God: you shall sanctify yourselves and be holy, for I am holy. You shall not make yourselves unclean through any swarming thing that moves upon the earth. For I the Lord am He who brought you up from the land of Egypt to be your God: you shall be holy, for I am holy. These are the instructions concerning animals, birds, all living creatures that move in water, and all creatures that swarm on earth, for distinguishing between the unclean and the clean, between the living things that may be eaten and the living things that may not be eaten.