Not to commit incest with one’s wife’s sister (ibid. 18:18)

Leviticus 18:18

KJV

Neither shalt thou take a wife to her sister, to vex her , to uncover her nakedness, beside the other in her life time .

ASV

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.

WEB

“‘You shall not take a wife in addition to her sister, to be a rival, to uncover her nakedness, while her sister is still alive.

JPS

And thou shalt not take a woman to her sister, to be a rival to her, to uncover her nakedness, beside the other in her lifetime.