BSB(i)
19 When a woman has a discharge consisting of blood from her body, she will be unclean due to her menstruation for seven days, and anyone who touches her will be unclean until evening.
20 Anything on which she lies or sits during her menstruation will be unclean,
21 and anyone who touches her bed must wash his clothes and bathe with water, and he will be unclean until evening.