Leviticus 15:25-26

25“Now if a woman has a discharge of her blood for many days not during her niddah or if she has a discharge beyond the time of her niddah all the days of the discharge of her uncleanness shall be as in the days of her niddah . She is unclean.

26Every bed where she lies all the days of her discharge will be like her bed during her niddah , and everything she sits on will become unclean like the uncleanness of her niddah .