Leviticus 18:18-20

New Century Version

¹⁸ “‘While your wife is still living, you must not take her sister as another wife. Do not have sexual relations with her.

¹⁹ “‘You must not go near a woman to have sexual relations with her during her monthly period, when she is unclean.

²⁰ “‘You must not have sexual relations with your neighbor’s wife and make yourself unclean with her.