'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.

When there is a man who has labored with wisdom, knowledge and skill, then he gives his legacy to one who has not labored with them. This too is vanity and a great evil.

Enjoy life with the woman whom you love all the days of your fleeting life which He has given to you under the sun; for this is your reward in life and in your toil in which you have labored under the sun.