Leviticus
I also will do this unto you; I will even appoint over you terror, consumption, and the burning ague, that shall consume the eyes, and cause sorrow of heart: and ye shall sow your seed in vain, for your enemies shall eat it.
And your strength shall be spent in vain: for your land shall not yield her increase, neither shall the trees of the land yield their fruits.
Job
She is hardened against her young ones, as though they were not hers: her labour is in vain without fear;
Psalms
O ye sons of men, how long will ye turn my glory into shame? how long will ye love vanity, and seek after leasing? Selah.
Isaiah
For the Egyptians shall help in vain, and to no purpose: therefore have I cried concerning this, Their strength is to sit still.
Then I said, I have laboured in vain, I have spent my strength for nought, and in vain: yet surely my judgment is with the LORD, and my work with my God.
They shall not labour in vain, nor bring forth for trouble; for they are the seed of the blessed of the LORD, and their offspring with them.
Jeremiah
Nebuchadrezzar the king of Babylon hath devoured me, he hath crushed me, he hath made me an empty vessel, he hath swallowed me up like a dragon, he hath filled his belly with my delicates, he hath cast me out.
Thus saith the LORD of hosts; The broad walls of Babylon shall be utterly broken, and her high gates shall be burned with fire; and the people shall labour in vain, and the folk in the fire, and they shall be weary.
Habakkuk
Behold, is it not of the LORD of hosts that the people shall labour in the very fire, and the people shall weary themselves for very vanity?