Leviticus 18:17 ASV

¹⁵  Thou shalt not uncover the nakedness of thy daughter-in-law: she is thy son's wife; thou shalt not uncover her nakedness.

¹⁶  Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness.

¹⁷  Thou shalt not uncover the nakedness of a woman and her daughter; thou shalt not take her son's daughter, or her daughter's daughter, to uncover her nakedness; they are near kinswomen: it is wickedness.

¹⁸  And thou shalt not take a wife to her sister, to be a rival 'to her', to uncover her nakedness, besides the other in her life-time.

¹⁹  And thou shalt not approach unto a woman to uncover her nakedness, as long as she is impure by her uncleanness.