New Living Translation
Whatever happens, I will be found guilty. So what’s the use of trying?

American Standard Version
I shall be condemned; Why then do I labor in vain?

Berean Study Bible
Since I am already found guilty, why should I labor in vain?

Douay-Rheims Bible
But if so also I am wicked, why have I laboured in vain?

English Revised Version
I shall be condemned; why then do I labour in vain?

King James Bible
If I be wicked, why then labour I in vain?

World English Bible
I shall be condemned. Why then do I labor in vain?

Young's Literal Translation
I -- I am become wicked; why is this? In vain I labour.

Job 9:29 Additional Translations ...