Verse 9

You must not have sexual relations with your sister, whether she is your father’s daughter or your mother’s daughter, whether she is born in the same household or born outside it; you must not have sexual relations with either of them.

Referenced Verses

• Lev 20:17 : 17 “‘If a man has marital relations with his sister, whether the daughter of his father or his mother, so that he sees her nakedness and she sees his nakedness, it is a disgrace. They must be cut off in the sight of the children of their people. He has exposed his sister’s nakedness; he will bear his punishment for iniquity.
• Deut 27:22 : 22 ‘Cursed is the one who goes to bed with his sister, the daughter of either his father or mother.’ Then all the people will say,‘Amen!’
• Ezek 22:11 : 11 One commits an abominable act with his neighbor’s wife; another obscenely defiles his daughter-in-law; another violates his sister– his father’s daughter– within you.
• Lev 18:11 : 11 You must not have sexual relations with the daughter of your father’s wife born of your father; she is your sister. You must not have sexual relations with her.
• 2 Sam 13:11-14 : 11 As she brought them to him to eat, he grabbed her and said to her,“Come on! Get in bed with me, my sister!” 12 But she said to him,“No, my brother! Don’t humiliate me! This just isn’t done in Israel! Don’t do this foolish thing! 13 How could I ever be rid of my humiliation? And you would be considered one of the fools in Israel! Just speak to the king, for he will not withhold me from you.” 14 But he refused to listen to her. He overpowered her and humiliated her by raping her.