Leviticus 18:11NET Bible
You must not have sexual intercourse with the daughter of your father's wife born of your father; she is your sister. You must not have intercourse with her.
Related Verses
Genesis 2:17
but you must not eat from the tree of the knowledge of good and evil, for when you eat from it you will surely die."
Genesis 2:24
That is why a man leaves his father and mother and unites with his wife, and they become a new family.
Genesis 2:25
The man and his wife were both naked, but they were not ashamed.
Genesis 3:1
Now the serpent was more shrewd than any of the wild animals that the LORD God had made. He said to the woman, "Is it really true that God said, 'You must not eat from any tree of the orchard'?"
Genesis 3:3
but concerning the fruit of the tree that is in the middle of the orchard God said, 'You must not eat from it, and you must not touch it, or else you will die.'"