Leviticus 15:2-4

2“Speak to the Israelites and tell them: When any man has a discharge from his member, he is unclean.

3This is uncleanness of his discharge: Whether his member secretes the discharge or retains it, he is unclean. All the days that his member secretes or retains anything because of his discharge, he is unclean.

4Any bed the man with the discharge lies on will be unclean, and any furniture he sits on will be unclean.