Leviticus 18:6

Laws of Sexual Relations

18:6 “‘No man is to approach any close relative to have sexual intercourse with her. I am the Lord.

Leviticus 18:18

18:18 You must not take a woman in marriage and then marry her sister as a rival wife while she is still alive, to have sexual intercourse with her.

Leviticus 18:17

18:17 You must not have sexual intercourse with both a woman and her daughter; you must not take as wife either her son’s daughter or her daughter’s daughter to have intercourse with them. They are closely related to her – it is lewdness.