If any touch a person who has been killed or has died a natural death outdoors or if any touch a human bone or a grave, they become unclean for seven days.
The Lord commanded Moses to tell the Aaronite priests, “No priest is to make himself ritually unclean by taking part in the funeral ceremonies when a relative dies,
Now all of you who have killed anyone or have touched a corpse must stay outside the camp for seven days. On the third day and on the seventh day purify yourselves and the women you have captured.
“Command the people of Israel to expel from the camp everyone with a dreaded skin disease or a bodily discharge and everyone who is unclean by contact with a corpse.
Your hair is the sign of your dedication to God, and so you must not defile yourself by going near a corpse, not even that of your father, mother, brother, or sister.
But there were some people who were ritually unclean because they had touched a corpse, and they were not able to keep the Passover on that day. They went to Moses and Aaron
“How terrible for you, teachers of the Law and Pharisees! You hypocrites! You are like whitewashed tombs, which look fine on the outside but are full of bones and decaying corpses on the inside.