'Laboured' in the Bible

And who knoweth whether he will be a wise man or a fool? yet shall he have rule over all my labour at which I have laboured, and wherein I have been wise under the sun. This also is vanity.

Then I went about to cause my heart to despair of all the labour wherewith I had laboured under the sun.

For there is a man whose labour hath been with wisdom, and with knowledge, and with skill, and who leaveth it to a man that hath not laboured therein, to be his portion. This also is vanity and a great evil.

And this also is a grievous evil, that in all points as he came so doth he go away, and what profit hath he, in having laboured for the wind?