'Toiled' in the Bible

So I hated all the fruit (gain) of my labor for which I had labored under the sun, because I must leave it to the man who will succeed me.

And who knows whether he will be a wise man or a fool? Yet he will have control over all the fruit of my labor for which I have labored by acting wisely under the sun. This too is vanity (futility, self-conceit).

For there is a man who has labored with wisdom and knowledge and skill, yet gives his legacy to one who has not labored for it. This too is vanity and a great evil.

For what does a man get from all his labor and from the striving and sorrow of his heart with which he labors under the sun?

“Yet you have not called on Me [in prayer and worship], O Jacob;But you have grown weary of Me, O Israel.

The Lord has sworn [an oath] by His right hand and by His mighty arm,“I will never again give your grain as food for your enemies,Nor will [the invading] foreigners drink your new wine for which you have labored.”

“But the shameful act [of idolatry] has consumed the labor of our fathers since our youth—their flocks and their herds, their sons and their daughters.

Simon replied, “Master, we worked hard all night [to the point of exhaustion] and caught nothing [in our nets], but at Your word I will [do as you say and] lower the nets [again].”

I sent you to reap [a crop] for which you have not worked. Others have worked and you have been privileged to reap the results of their work.”

But you know of Timothy’s tested worth and his proven character, that he has served with me to advance the gospel like a son serving with his father.

Indeed, I ask you too, my true companion, to help these women [to keep on cooperating], for they have shared my struggle in the [cause of the] gospel, together with Clement and the rest of my fellow workers, whose names are in the Book of Life.