Leviticus 15:5, 10-11

Anyone who touches his bed must wash his clothes and bathe in water, and the person will be unclean until evening.

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. “ ‘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.