Leviticus 15:9-11

New Century Version

⁹ Everything on which the person who is unclean sits when riding will become unclean. ¹⁰ Anyone who touches something that was under him will be unclean until evening. And anyone who carries these things must wash his clothes and bathe in water; he will be unclean until evening.

¹¹ “‘If the person who discharges a body fluid has not washed his hands in water and touches another person, that person must wash his clothes and bathe in water; he will be unclean until evening.