'Striving After Wind' in the Bible

I have seen all the works that are done under the sun, and, behold, all is vanity and a striving after wind.

And I applied my heart to know wisdom, and to know madness and folly. I perceived that this also was a striving after wind.

Then I looked on all the works that my hands had wrought, and on the labor that I had labored to do, and, behold, all was vanity and a striving after wind, and there was no profit under the sun.

So I hated life, because the work that is wrought under the sun was grievous to me. For all is vanity and a striving after wind.

For to the man who pleases him [God] gives wisdom and knowledge and joy, but to the sinner he gives travail, to gather and to heap up, that he may give to him who pleases God. This also is vanity and a striving after wind.

Better is the sight of the eyes than the wandering of the desire. This also is vanity and a striving after wind.