Leviticus 22:4

‘But the person who eats the flesh of the sacrifice of peace offerings which belong to Yahweh, in his uncleanness, that person shall be cut off from his people.

“Speak to the sons of Israel and say to them, ‘When any man has a discharge from his body, his discharge is unclean.

‘Now if a man has a seminal emission, he shall bathe all his body in water and be unclean until evening.

“This also is yours, the contribution from their gift, even all the wave offerings of the sons of Israel; I have given them to you and to your sons and daughters with you as a perpetual statute. Everyone of your household who is clean may eat it.

‘Anyone who touches a corpse, the body of a man who has died, and does not purify himself, makes the tabernacle of Yahweh unclean; and that person shall be cut off from Israel. Because the water for impurity was not splashed on him, he shall be unclean; his uncleanness is still on him.

Then Haggai said, “If one who is unclean from a corpse touches any of these, will the latter become unclean?” And the priests answered, “It will become unclean.”