TSK · Leviticus 18:9

The nakedness of thy father's wife's daughter, begotten of thy father, she [is] thy sister, thou shalt not uncover her nakedness.

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 she answered him, Nay, my brother, do not force me; for no such thing ought to be done in Israel: do not thou this folly.