'Works' in the Bible

I have seen all the works that are done under the sun; and behold, all is vanity and a chasing after wind.

I made myself great works. I built myself houses. I planted myself vineyards.

Then I looked at all the works that my hands had worked, and at the labor that I had labored to do; and behold, all was vanity and a chasing after wind, and there was no profit under the sun.

What profit has he who works in that in which he labors?

Therefore I saw that there is nothing better, than that a man should rejoice in his works; for that is his portion: for who can bring him to see what will be after him?

For all this I laid to my heart, even to explore all this: that the righteous, and the wise, and their works, are in the hand of God; whether it is love or hatred, man doesn't know it; all is before them.

Go your way -- eat your bread with joy, and drink your wine with a merry heart; for God has already accepted your works.