Leviticus 15:31-33

31You must keep the children of Israel separate from their uncleanness, so that they do not die by defiling My tabernacle, which is among them.

32This is the law of him who has a discharge, of the man who has an emission of semen whereby he is unclean, 33of a woman in her menstrual period, of any male or female who has a discharge, and of a man who lies with an unclean woman.’”