Leviticus 20:18
If a man lies [intimately] with a woman during her menstrual cycle and uncovers her nakedness, he has exposed her flow, and she has uncovered the flow of her blood; both of them shall be cut off from their people [excluding them from the atonement made for them].
Leviticus 15:24
If a man actually lies with her so that her menstrual impurity is on him, he shall be unclean for seven days; and every bed on which he lies shall be unclean.
Leviticus 18:19
‘Also you shall not approach a woman to uncover her nakedness during her menstrual impurity and ceremonial uncleanness.
Ezekiel 18:6
and does not eat [at the pagan shrines] on the mountains or raise his eyes to the idols of the house of Israel, or defile his neighbor’s wife or approach a woman during her [monthly] time of impurity—
Ezekiel 22:10
In you men have uncovered their fathers’ nakedness [the nakedness of mother or stepmother]; in you they have violated women who are [set apart as ceremonially] unclean during their menstrual impurity [or after childbirth].