a sore

Ecclesiastes 5:13
There is a grievous evil I have seen under the sun: wealth hoarded to the harm of its owner,

Ecclesiastes 2:22, 23
For what does a man get for all the labor and endeavors at which he toils under the sun? . . .

what

1 Samuel 12:21
Do not turn aside after worthless things that cannot profit you or deliver you, for they are empty.

Jeremiah 2:8
The priests did not ask, 'Where is the LORD?' The experts in the law no longer knew Me, and the leaders rebelled against Me. The prophets prophesied by Baal and followed useless idols.

Mark 8:36
What does it profit a man to gain the whole world, yet forfeit his soul?

for

Ecclesiastes 1:3
What does a man gain from all his labor, at which he toils under the sun?

Proverbs 11:29
He who brings trouble on his house will inherit the wind, and the fool will be servant to the wise of heart.

Isaiah 26:18
We were pregnant, we writhed in pain, we gave birth to wind. We have brought no salvation to the earth, nor brought any life into the world.

Hosea 8:7
Indeed, they sow the wind and reap the whirlwind. There is no standing grain; what sprouts fails to yield flour. Even if it should produce, the foreigners would swallow it up.

John 6:27
Do not work for food that perishes, but for food that endures to eternal life, which the Son of Man will give you. For on Him God the Father has placed His seal of approval."