17. Any piece of cloth or leather with semen on it shall be washed with water and be unclean until evening.
18. If a man has sexual relations with a woman, they shall both bathe in water and be unclean until evening.
19. When a woman has a flow of blood from her body, she shall be in a state of menstrual uncleanness for seven days. Anyone who touches her shall be unclean until evening.
20. Anything on which she lies or sits during her menstrual period shall be unclean.
21. Anyone who touches her bed shall wash his garments, bathe in water, and be unclean until evening.
22. Whoever touches any article on which she was sitting shall wash his garments, bathe in water, and be unclean until evening.
23. Whether an object is on the bed or on something she sat upon, when the person touches it, that person shall be unclean until evening.
24. If a man lies with her, he contracts her menstrual uncleanness and shall be unclean for seven days; every bed on which he then lies also becomes unclean.
25. When a woman has a flow of blood for several days outside her menstrual period, or when her flow continues beyond the ordinary period, as long as she suffers this unclean flow she shall be unclean, just as during her menstrual period.