Unclean - If the due purification was omitted at the time, through negligence or forgetfulness, a sin-offering was required. See Leviticus 5…

And whatsoever goes upon his paws. —Rather, and whatsoever goes upon his palms, that is, those animals whose fee…

Whatsoever goes upon his paws
Or "the palms" ^F4 of his hands; meaning such creatures, whose feet are not …

These laws seem to have been intended,

1. As a test of the people's obedience, as Adam was forbidden to eat from the tree of knowledge…