GOD'S WORD® Translation
While your wife is living, never marry her sister as a rival wife and have sexual intercourse with her.

American Standard Version
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.

Berean Study Bible
You must not take your wife’s sister as a rival wife and have sexual relations with her while your wife is still alive.

Douay-Rheims Bible
Thou shalt not take thy wife's sister for a harlot, to rival her, neither shalt thou discover her nakedness, while she is yet living.

English Revised Version
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 life time.

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

World English Bible
"'You shall not take a wife to her sister, to be a rival, to uncover her nakedness, while her sister is yet alive.

Young's Literal Translation
'And a woman unto another thou dost not take, to be an adversary, to uncover her nakedness beside her, in her life.

Leviticus 18:18 Additional Translations ...