Leviticus 15:31-33

31“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.”

32This is the law for the one who has a discharge and for the one who has a seminal emission, so that he is unclean by it;

33and for the woman who is ill because of her monthly period, and for the one who has a discharge, whether man or woman, or for a man who lies with a woman who is [ceremonially] unclean.