Leviticus 15:33
for her whose menstruation causes her to become ill, for anyone who has a discharge (whether male or female), and for the man who has sexual relations with one who is unclean."
Leviticus 15:19
"When a woman has a discharge, and the blood is her monthly menstrual discharge from her body, then for seven days she is to remain in her menstrual uncleanness. Whoever touches her will remain unclean until evening.
Leviticus 15:24-25
When a man has sexual relations with her and her menstrual uncleanness touches him, he will be unclean for seven days. Every bed where he sleeps will remain unclean.
Leviticus 20:18
"If a man has sexual relations with a menstruating woman, he has exposed her nakedness, laying bare her fountain. He has exposed the source of her blood. Both are to be eliminated from contact with their people.