'All is Vanity' in the Bible

Vanity of vanities, says the Preacher, vanity of vanities, all is vanity.

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

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 that which befalls the sons of men befalls beasts, even one thing befalls them; as the one dies, so dies the other. Yea, they all have one breath, and man has no preeminence above the beasts; for all is vanity.

Vanity of vanities, says the Preacher, all is vanity.