Levítico 15

25 And when a woman’s discharge of blood flows many days within the time of her separation, or when it flows over her separation—all the days of the discharge of her uncleanness are as the days of her separation; she [is] unclean. 26 Every bed on which she lies all the days of her discharge is as the bed of her separation to her, and every vessel on which she sits is unclean as the uncleanness of her separation; 27 and anyone who is coming against them is unclean, and has washed his garments, and has bathed with water, and been unclean until the evening.