Leviticus 15:2-4

²Speak unto the children of Israel, and say unto them, If any man have a flux from his flesh, because of his flux he is unclean.

³And this shall be his uncleanness in his flux: whether his flesh run with his flux, or his flesh be closed from his flux, it is his uncleanness.

⁴Every bed whereon he lieth that hath the flux shall be unclean; and every object on which he sitteth shall be unclean.