If a man sleeps with a menstruating woman and has sexual intercourse with her, he has exposed the source of her flow, and she has uncovered the source of her blood. Both of them are to be cut off from their people.
If a man sleeps with her, and blood from her menstruation gets on him, he will be unclean for seven days, and every bed he lies on will become unclean.
He does not eat at the mountain shrines , or look to the idols of the house of Israel. He does not defile his neighbour’s wife or approach a woman during her menstrual impurity.
‘When a woman has a discharge, and it consists of blood from her body, she will be unclean because of her menstruation for seven days. Everyone who touches her will be unclean until evening.
‘Tell the Israelites: When a woman becomes pregnant and gives birth to a male child, she will be unclean seven days, as she is during the days of her menstrual impurity.
David sent messengers to get her, and when she came to him, he slept with her. Now she had just been purifying herself from her uncleanness. Afterwards, she returned home.