You must not eat their meat or touch their carcasses; they are unclean for you.
Now that Aaron was consecrated a high priest over the house of God, God spoke to him with Moses, and appointed them both as joint-commissioners to deliver his will to the people. He spoke both to Moses and to Aaron about this matter; for it was particularly required of the priests that they should put a difference between clean and unclean, and teach the people to do so.
Commenting on Leviticus 11:1-8
Of their flesh shall ye not eat,.... Meaning, not of swine only, but of the camel, coney, and hare: and their carcass shall ye not touch; which must not be understood of touching them in any sense; for then it would have been unlawful for a Jew to have rode upon a camel, or to take out and make use of hog's lard in medicine...
Of their flesh shall ye not eat, and their carcase shall ye not touch; they [are] unclean to you. (c) God would that by this for a time they should be discerned as his people from the Gentiles.