Then Adonai said to Moses, “Speak to the kohanim, the sons of Aaron, and say to them: A kohen is not to allow himself to become unclean for the dead among his people,
Anyone touching the dead body of any man, who does not purify himself, defiles Adonai’s Tabernacle, and that person will be cut off from Israel. Because the cleansing water was not sprinkled on him, he is unclean and his uncleanness will remain on him.
“Now if someone should die suddenly in his presence, thereby defiling his dedicated head, he is to shave his head on the day of his purification—the seventh day.
However, there were some men who could not celebrate Passover because of being defiled by a dead body. So they came to Moses and Aaron on that same day,