Deuteronomy 27:22
‘Cursed is he who is intimate with his [half] sister, whether his father’s or his mother’s daughter.’ And all the people shall say, ‘Amen.’
Leviticus 18:9
You shall not uncover the nakedness of your sister, either the daughter of your father or of your mother, whether born at home or born elsewhere.
Leviticus 20:17
‘If a man takes his sister, his father’s daughter or his mother’s daughter, so that he sees her nakedness and she sees his nakedness, it is a disgrace; and they shall be cut off in the sight of the sons of their people. He has uncovered his sister’s nakedness; he bears [responsibility for] his guilt.
Ezekiel 22:11
In you one has committed a shameful act with his neighbor’s wife, another has lewdly defiled his daughter-in-law, and another has violated his sister, his father’s daughter.
2 Samuel 13:1
It happened afterwards that Absalom the son of David had a beautiful sister whose name was Tamar, and Amnon [her half brother] the son of David was in love with her.
2 Samuel 13:8-14
So Tamar went to her brother Amnon’s house, and he was in bed. And she took dough and kneaded it, and made cakes in his sight, and baked them.