Leviticus 18:15-17

Amplified Bible

¹⁵ You shall not uncover the nakedness of your daughter-in-law; she is your son’s wife. You shall not uncover her nakedness. ¹⁶ You shall not uncover the nakedness of your brother’s wife; it is your brother’s nakedness. ¹⁷ You shall not uncover the nakedness of a woman and her daughter, nor shall you take her son’s daughter or her daughter’s daughter to uncover their nakedness (have intimate relations with them); they are [her] blood relatives; it is an outrageous offense.