Now the Lord spoke to Moses and Aaron, saying to them, "Speak to the children of Israel, saying, 'These are the animals which you may eat among all the animals that are on the earth: Among the animals, whatever divides the hoof, having cloven hooves and chewing the cud; that you may eat. Nevertheless these you shall not eat among those that chew the cud or those that have cloven hooves: the camel, because it chews the cud but does not have cloven hooves, is unclean to you; the rock hyrax, because it chews the cud but does not have cloven hooves, is unclean to you; the hare, because it chews the cud but does not have cloven hooves, is unclean to you; and the swine, though it divides the hoof, having cloven hooves, yet does not chew the cud, is unclean to you. Their flesh you shall not eat, and their carcasses you shall not touch. They are unclean to you.'"

a. Among the animals, whatever divides the hoof, having cloven hooves and chewing the cud; that you may eat: The rule was simple. If an animal had a divided hoof (not a single hoof as a horse has), and chewed its cud, it could be eaten.

b. These you shall not eat among those that chew the cud or those that have cloven hooves: For example, the camel, the rock hyrax, and the hare all chew the cud, but do not have divided hooves - instead, they have paws - they are considered unkosher.

c. And the swine, though it divides the hoof, having cloven hooves, yet does not chew the cud, is unclean to you: Additionally, the swine has a divided hoof, but it does not chew the cud - so it is considered unkosher.

i. “It is now known that the pig is the intermediate host for several parasitic organisms, some of which can result in tapeworm infestation. One of these worms, the Taenia solium, grows to about 2.5 m in length, and is found in poorly cooked pork.” (Harrison)

d. Their flesh you shall not eat, and their carcasses you shall not touch: If an animal was considered unclean, one obviously could not eat it. Yet additionally, one could not touch an unclean animal, whether living or dead.

i. God was not making up new rules for Israel. Noah knew about clean and unclean animals (Genesis 7:2, 8:20). God simply codified what was already in the traditions of Israel.