Leviticus 18:17-19

Tree of Life Version

¹⁷ You are not to uncover the nakedness of both a woman and her daughter. You are not to take her son’s daughter, or her daughter’s daughter, to uncover her nakedness, for they are direct relatives. That is wickedness. ¹⁸ You are not to marry your wife’s sister, to be a rival, uncovering her nakedness, while her sister is still alive.

Other Forbidden Relations

¹⁹ “You are not to approach a woman to uncover her nakedness while she is in the impurity of her niddah.