Leviticus 15:5, 10-11

Anyone, moreover, who touches his bed shall wash his clothes and bathe in water and be unclean until evening

Whoever then touches any of the things which were under him shall be unclean until evening, and he who carries them shall wash his clothes and bathe in water and be unclean until evening. Likewise, whomever the one with the discharge touches without having rinsed his hands in water shall wash his clothes and bathe in water and be unclean until evening.