Leviticus 15:1-4

Laws About Bodily Discharges

The  Lord spoke to Moses and Aaron, saying, Speak to the people of Israel and say to them, a When any man has a discharge from his body
Hebrew flesh; also verse 3
his discharge is unclean.
And this is the law of his uncleanness for a discharge: whether his body runs with his discharge, or his body is blocked up by his discharge, it is his uncleanness. Every bed on which the one with the discharge lies shall be unclean, and everything on which he sits shall be unclean.
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