Leviticus 15:20-22

Amplified Bible

²⁰ Everything on which she lies during her menstrual impurity shall be unclean; and everything on which she sits shall be unclean. ²¹ Anyone who touches her bed shall wash his clothes and bathe in water, and be unclean until evening. ²² Whoever touches anything on which she sits shall wash his clothes and bathe in water, and be unclean until evening.