Leviticus 15:25

And if a woman have an issue of her blood many days out of the time of her separation, beyond the normal limit of seven days, as in the case of the woman whom Jesus healed, Matthew 9:20, or if it run beyond the time of her separation, all the days of the issue of her uncleanness shall be as the days of Her separation; she shall be unclean; during that whole period she was to be regarded as being in the uncleanness of menstruation.