Bible Verses About Vanity: Worldly labour is

And when I turned myself to all the works which my hands had wrought, and to the labours wherein I had laboured in vain, I saw in all things vanity, and vexation of mind, and that nothing was lasting under the sun.

Again I considered all the labours of men, and I remarked that their industries are exposed to the envy of their neighbour: so in this also there is vanity, and fruitless care.