Leviticus 18:18
16 You must not have sexual relations with your brother’s wife; she is your brother’s nakedness. 17 You must not have sexual relations with both a woman and her daughter; you must not take as wife either her son’s daughter or her daughter’s daughter to have sexual relations with them. They are closely related to her—it is lewdness. 18 You must not take a woman in marriage and then marry her sister as a rival wife while she is still alive, to have sexual relations with her. 19 “‘You must not approach a woman in her menstrual impurity to have sexual relations with her. 20 You must not have sexual relations with the wife of your fellow citizen to become unclean with her.
Samaritan Leviticus 18:18
Samaritan Penteteuch16 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, neither shalt thou take her son's daughter, or her daughter's daughter, to uncover her nakedness; for they are her near kinswomen: it is wickedness. 18 And you shall not marry a woman over another as a rival to her, to uncover her nakedness, while she is alive. 19 Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness. 20 Moreover thou shalt not lie carnally with thy neighbour's wife, to defile thyself with her.
Notes and References
"... Leviticus 18:18: “Over her sister” — The Israelite Samaritan sages understood “sister” as a sister of the same faith, and not meaning only the same family. However, according to the development of the practice of this commandment, the sages permitted marrying a second woman on two conditions: 1. that the first woman is barren, 2. with the permission of the first wife ..."
Tsedaka, Benyamim The Israelite Samaritan Version of the Torah: First English Translation Compared with the Masoretic Version (p. 272) William B. Eerdmans Publishing Company, 2013