11 “ ‘Do not have sexual relations with the daughter of your father’s wife, born to your father; she is your sister.

Read Leviticus 18:11 Using Other Translations

The nakedness of thy father's wife's daughter, begotten of thy father, she is thy sister, thou shalt not uncover her nakedness.
You shall not uncover the nakedness of your father's wife's daughter, brought up in your father's family, since she is your sister.
“Do not have sexual relations with your stepsister, the daughter of any of your father’s wives, for she is your sister.