Leviticus 15:25-26

25And if a woman have her flux of blood many days out of the time of her separation, or if she have the flux beyond the time of her separation, all the days of the flux of her uncleanness shall she be as [in] the days of her separation: she is unclean.

26Every bed whereon she lieth all the days of her flux shall be unto her as the bed of her separation; and every object on which she sitteth shall be unclean, according to the uncleanness of her separation.