'Labor In Vain' in the Bible

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

She made hard to her sons as not to her: her labor in vain without fear;

Except Jehovah build the house, They labor in vain that build it: Except Jehovah keep the city, The watchman waketh but in vain.

They shall not labor in vain, nor bring forth for calamity; for they are the seed of the blessed of Jehovah, and their offspring with them.

Thus says the Lord of hosts,“The broad wall of Babylon will be completely overthrown and the foundations razedAnd her high gates will be set on fire;The peoples will labor in vain,And the nations become exhausted [only] for fire [that will destroy their work].”

I am afraid of you, lest I have bestowed upon you labor in vain.

holding forth the word of life; that I may have whereof to glory in the day of Christ, that I did not run in vain neither labor in vain.