You shall not approach a woman who is undergoing menstruation, nor shall you uncover her foulness
Other versions
King James Version
Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness.English Standard Version
"You shall not approach a woman to uncover her nakedness while she is in her menstrual uncleanness.New International Version
"'Do not approach a woman to have sexual relations during the uncleanness of her monthly period.