'Labored' in the Bible

When I considered all that I had accomplished and what I had labored to achieve, I found everything to be futile and a pursuit of the wind. There was nothing to be gained under the sun.

I hated all my work that I labored at under the sun because I must leave it to the man who comes after me.

And who knows whether he will be a wise man or a fool? Yet he will take over all my work that I labored at skillfully under the sun. This too is futile.

So I began to give myself over to despair concerning all my work that I had labored at under the sun.