Leviticus

And if a man shall take his sister, his father’s daughter, or his mother’s daughter, and see her nakedness, and she see his nakedness; it is a wicked thing; and they shall be cut off in the sight of their people: he hath uncovered his sister’s nakedness; he shall bear his iniquity.

Cursed be he that lieth with his sister, the daughter of his father, or the daughter of his mother. And all the people shall say, Amen.

And one hath committed abomination with his neighbour’s wife; and another hath lewdly defiled his daughter in law; and another in thee hath humbled his sister, his father’s daughter.

And when she had brought them unto him to eat, he took hold of her, and said unto her, Come lie with me, my sister.

Howbeit he would not hearken unto her voice: but, being stronger than she, forced her, and lay with her.