'Profit' in the Bible

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?

Moreover the profit of the earth is for all. The king profits from the field.

This also is a grievous evil, that in all points as he came, so shall he go. And what profit does he have who labors for the wind?

For there are many words that create vanity. What does that profit man?

If the snake bites before it is charmed, then is there no profit for the charmer's tongue.