Numbers 19:11-13

“Whoever touches any dead body will be unclean for seven days. He is to purify himself on the third day and on the seventh day. Then he will be clean. But if he does not purify himself on the third and seventh days, he will not be clean. 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.