'Task' in the Bible

I applied my mind to seek and explore through wisdom all that is done under heaven. God has given people this miserable task to keep them occupied.

Because all his days his task is painful and grievous; even at night his mind does not rest. This too is vanity.

For to the man who is pleasing in His sight, He gives wisdom, knowledge, and joy, but to the sinner He gives the task of gathering and accumulating in order to give to the one who is pleasing in God’s sight. This too is futile and a pursuit of the wind.

I have seen the task that God has given people to keep them occupied.

There is a person without a companion, without even a son or brother, and though there is no end to all his struggles, his eyes are still not content with riches. “So who am I struggling for,” he asks, “and depriving myself from good?” This too is futile and a miserable task.

When I gave my heart to know wisdom and to see the task which has been done on the earth (even though one should never sleep day or night),