Leviticus 18:19

19“ ‘Do not approach a woman to have sexual relations during the uncleanness of her monthly period.

19‘Also you shall not approach a woman to uncover her nakedness during her menstrual impurity.

19‘Also you shall not approach a woman to uncover her nakedness during her menstrual impurity.

19‘Also you shall not approach a woman to uncover her nakedness during her menstrual impurity and ceremonial uncleanness.

19You must not approach a woman to have sexual relations with her during her menstrual period.

19“ ‘Do not have sex with a woman during her monthly period. She is “unclean” at that time.