Lev.18.19

Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness.

Lev.18.19

"Don't have sex with a woman during the time of her menstrual period when she is unclean.

Lev.18.19

"'Do not approach a woman to have sexual relations during the uncleanness of her monthly period.

Lev.18.19

"Also you shall not approach a woman to uncover her nakedness as long as she is in her customary impurity.