Leviticus 18:8-10

Amplified Bible

⁸ You shall not uncover the nakedness of your father’s wife; it is your father’s nakedness. ⁹ You shall not uncover the nakedness of your sister, either the daughter of your father or of your mother, whether born at home or born elsewhere. ¹⁰ You shall not uncover the nakedness of your son’s daughter or your daughter’s daughter; their nakedness you shall not uncover, for they are your own nakedness [that is, your own descendants].