New Living Translation
“While your wife is living, do not marry her sister and have sexual relations with her, for they would be rivals.

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 ...