He that toucheth the dead body... — The defilement caused by touching the dead body of a beast lasted only until the evening (Leviticus 11:24). The death of man was the wages of sin; and hence contact with the dead body of a man was attended by ceremonial defilement of longer duration.
Related Commentaries of Numbers 19:11
Numbers 19:11
11 He that toucheth the dead body of any mana shall be unclean seven days.