If it be hidden from him If he did it unawares, yet that would not excuse him, because he should have been more circumspect to avoid all unclean things. Hereby God designed to awaken men to watchfulness against, and repentance for, their unknown, or unobserved sins. He shall be unclean Not morally, for the conscience was not directly polluted by these things, but ceremonially. When he knoweth As soon as he knoweth it, he must not delay to make his peace with God. Otherwise he shall be guilty For his violation and contempt of God's authority and command.
Related Commentaries of Leviticus 5:2
Leviticus 5:2-3
2 Or if a soul touch any unclean thing, whether it be a carcase of an unclean beast, or a carcase of unclean cattle, or the carcase of unclean creeping things, and if it be hidden from him; he also shall be unclean, and guilty.
3 Or if he touch the uncleanness of man, whatsoever uncleanness it be that a man shall be defiled withal, and it be hid from him; when he knoweth of it, then he shall be guilty.