Deuteronomy 27:22
Cursed is he who has sex relations with his sister, the daughter of his father or of his mother. And let all the people say, So be it.
Leviticus 18:9
You may not take your sister, the daughter of your father or of your mother, wherever her birth took place, among you or in another country.
Leviticus 20:17
And if a man takes his sister, daughter of his father or his mother, and has sex relations with her and she with him, it is an act of shame: they are to be cut off before the children of their people; he has had sex relations with his sister, and his sin will be on him.
Ezekiel 22:11
And in you one man has done what was disgusting with his neighbour's wife; and another has made his daughter-in-law unclean; and another has done wrong to his sister, his father's daughter.
2 Samuel 13:1
Now after this, it came about that Absalom, David's son, had a beautiful sister, whose name was Tamar; and David's son Amnon 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 paste and made cakes before his eyes, cooking them over the fire.