To make a difference between the unclean and the
clean,
&c.] Whether of beasts, fish, fowl, and flying creeping
things:
and between the beast that may be eaten, and the beast that
may not
be eaten;
the former clause takes in all in general, this instances in a
particular sort of creatures; and the first mentioned of which,
that might be eaten, are, that part the hoof, are cloven footed,
and chew the cud; and that might not, that chew the cud, but
divide not the hoof, or divide the hoof, but chew not the cud;
and now, by such like descriptions and distinctions of the
creatures treated of, the Israelites would be able to make a
difference between the one and the other, and know what was to be
eaten, and what not.