And I saw that all toil and all achievement spring from one person's envy of another. This too is meaningless, a chasing after the wind.
NIV
Then I saw that all painful effort in labor and all skill in work comes from man's rivalry with his neighbor. This is also vanity, a vain striving after the wind and a feeding on it.
AMP
Again, I considered all travail, and every right work, that for this a man is envied of his neighbour. This is also vanity and vexation of spirit.
KJV