'Labored' in the Bible

“Persist, then, [Babylon] in your enchantmentsAnd your many sorceriesWith which you have labored from your youth;Perhaps you will be able to profit [from them],Perhaps you may prevail and cause trembling.

“This is how they have become to you, those [astrologers and sorcerers] with whom you have labored,Those who have done business with you from your youth;Each has wandered in his own way.There is no one to save you.

Then I said, “I have labored in vain,I have spent My strength for nothing and vanity (pride, uselessness);However My justice is with the Lord,And My reward is with My God.”