4 But I said, “I have labored in vain; I have spent my strength for nothing at all. Yet what is due me is in the LORD’s hand, and my reward is with my God.”

Read Isaiah 49:4 Using Other Translations

Then I said, I have laboured in vain, I have spent my strength for nought, and in vain: yet surely my judgment is with the LORD, and my work with my God.
But I said, "I have labored in vain; I have spent my strength for nothing and vanity; yet surely my right is with the LORD, and my recompense with my God."
I replied, “But my work seems so useless! I have spent my strength for nothing and to no purpose. Yet I leave it all in the LORD ’s hand; I will trust God for my reward.”