Leviticus 18:18-20 Holman Christian Standard Bible (HCSB)
18 You are not to marry a woman as a rival to her sister and have sexual intercourse with her during her sister’s lifetime.
19 “You are not to come near a woman during her menstrual impurity to have sexual intercourse with her. 20 You are not to have sexual intercourse with[a] your neighbor’s wife, defiling yourself with her.
Leviticus 18:18-20 New International Version (NIV)
18 “‘Do not take your wife’s sister as a rival wife and have sexual relations with her while your wife is living.
19 “‘Do not approach a woman to have sexual relations during the uncleanness of her monthly period.
20 “‘Do not have sexual relations with your neighbor’s wife and defile yourself with her.