Ecclesiastes 2:23

2:23 For all day long his work produces pain and frustration,

and even at night his mind cannot relax!

This also is futile!

Ecclesiastes 5:16-17

5:16 This is another misfortune:

Just as he came, so will he go.

What did he gain from toiling for the wind?

5:17 Surely, he ate in darkness every day of his life,

and he suffered greatly with sickness and anger.

Ecclesiastes 6:12

6:12 For no one knows what is best for a person during his life –

during the few days of his fleeting life –

for they pass away like a shadow.

Nor can anyone tell him what the future will hold for him on earth.

Genesis 47:9

47:9 Jacob said to Pharaoh, “All the years of my travels are 130. All the years of my life have been few and painful; the years of my travels are not as long as those of my ancestors.”

Psalms 39:6

39:6 Surely people go through life as mere ghosts.

Surely they accumulate worthless wealth

without knowing who will eventually haul it away.”