Leviticus 16:1
              And the LORD spake unto Moses after the death of the two sons of Aaron, when they offered before the LORD, and died; 
           
                
              Leviticus 17:15
              And every soul that eateth that which died of itself, or that which was torn with beasts, whether it be one of your own country, or a stranger, he shall both wash his clothes, and bathe himself in water, and be unclean until the even: then shall he be clean.