Leviticus 15:19-24

“ ‘When a woman has her monthly period, she is unclean for seven days; anyone who touches her will be unclean until evening. Anything she lies on during this time will be unclean, and everything she sits on during this time will be unclean. Anyone who touches her bed must wash his clothes and bathe in water; that person will be unclean until evening. Anyone who touches something she has sat on must wash his clothes and bathe in water; that person will be unclean until evening. It does not matter if the person touched the woman’s bed or something she sat on; he will be unclean until evening. “ ‘If a man has sexual relations with a woman and her monthly period touches him, he will be unclean for seven days; every bed he lies on will be unclean.