18. If a man lies with a woman, and there is an emission of semen, they shall both bathe themselves in water and be unclean until the evening.
19. If a woman has a discharge, and the discharge from her body is blood, she shall be set apart for seven days; and whoever touches her shall be unclean until the evening.
20. Everything that she lies on in her menstrual impurity shall be unclean. Also, everything that she sits on shall be unclean.
21. Whoever touches her bed shall wash his clothes and bathe himself in water, and be unclean until the evening.
22. Whoever touches anything on which she sits shall wash his clothes and bathe himself in water, and be unclean until the evening.
23. Whether it is the bed or anything on which she sits, when he touches it he shall be unclean until the evening.
24. If any man lies with her, and her menstrual impurity is on him, he shall be unclean seven days, and every bed where he lies shall be unclean.