'Work' in the Bible

So I hated life because the work done under the sun [is] grievous to me. For everything [is] vanity and chasing wind!

So I said {to myself}, "God will surely judge the righteous and the wicked, for he has appointed a time [of judgment] for every deed and every work."

I also realized that all [of the] toil and all [of] the skillful work that is done--it [is] envy between one man and {another}. This also [is] vanity and chasing wind!

{The fool refuses to work with his hands, so he has nothing to eat except his own skin}!

Do not let your mouth lead your flesh into sin, and do not tell the messenger that it [was] a mistake. Why anger God at your words, so that he destroys the work of your hands?

Consider the work of God. For who is able to make straight what he made crooked?

Then I saw all the work of God--man [is] not able to discover the work that is done under the sun. Although man may toil in seeking, he cannot find it. Even if a wise man claims [that he] knows it, he cannot find it.

The fool is so worn out by a hard day's work {he cannot even find his way home at night}.

Just as you do not know how the path of the wind [goes], nor how the bones [of a fetus] form in a mother's womb, so you do not know the work of God who makes everything.