Ecclesiastes 8:16
When I applied my heart to know wisdom, and to see the business that is done on the earth: (for also there is that neither day nor night sees sleep with his eyes)
Psalm 127:2
It is vain to work hard for the food you eat by getting up early and going to bed late. Jehovah gives food to those he loves while they sleep.
Ecclesiastes 1:13
I devoted myself to study and explored wisdom concerning all that is done under the heavens. It is a grievous task God has given to the sons of men to be afflicted with.
Ecclesiastes 2:23
All his days are sorrow, and his work is full of grief. Even in the night his heart has no rest. This again is vanity.
Genesis 31:40
Many times I suffered from the heat during the day and from the cold at night. I was not able to sleep.
Ecclesiastes 4:8
There is a man who is by himself, without a companion. He is without son or brother. There is no end to all his work. He never has enough wealth. Nor is his eye satisfied with riches. He never asks: For whom do I labor and deprive myself of pleasure? This too is vanity and a terrible problem.
Ecclesiastes 5:12
The sleep of the workingman is pleasant, whether he eats little or much. However the full stomach of the rich man does not allow him to sleep.
Ecclesiastes 7:25
I applied my heart to know, and to search, and to seek out wisdom. I looked for the explanation, and to know the wickedness of folly, even of foolishness and madness.
Ecclesiastes 8:7
For he does not know what will be and who can tell him how and when it will be?
Ecclesiastes 8:9
I have seen all this and applied my heart to every work that is done under the sun. There is a time when one man rules over another to his own misery and harm.