Leviticus 18:18
King James Version
“Neither shalt thou take a wife to her sister, to vex to uncover her nakedness, beside the other in her life”
Context
15Thou shalt not uncover the nakedness of thy daughter in law: she thy son’s wife; thou shalt not uncover her nakedness.
16Thou shalt not uncover the nakedness of thy brother’s wife: it thy brother’s nakedness.
17Thou 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; they her near kinswomen: it wickedness.
18Neither shalt thou take a wife to her sister, to vex to uncover her nakedness, beside the other in her life
19Also thou shalt not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness.
20Moreover thou shalt not lie carnally with thy neighbour’s wife, to defile thyself with her.
21And thou shalt not let any of thy seed pass through to Molech, neither shalt thou profane the name of thy God: I the LORD.