Leviticus 15:25-31

‘Now if a woman has a flow of blood for many days, not during the time of her menstruation, or if she has a discharge beyond that period, as long as the impure discharge continues she shall be as she is in the days of her [normal] menstrual impurity; she is unclean. [Matt 9:20] Every bed on which she lies during the time of her discharge shall be to her like the bed of her menstrual impurity, and whatever she sits on shall be unclean, like the uncleanness of her monthly period. And whoever touches those things shall be unclean, and shall wash his clothes and bathe in water, and be unclean until evening. When she is cleansed from her discharge, then she shall count off for herself seven days, and after that she will be clean. Then on the eighth day she shall take for herself two turtledoves or two young pigeons and bring them to the priest at the doorway of the Tent of Meeting; and the priest shall offer one as a sin offering and the other as a burnt offering; and he shall make atonement for her before the LORD for her unclean discharge.’ “Thus you shall separate the Israelites from their uncleanness, so that they do not die in their uncleanness by their defiling My tabernacle that is among them.”