'Laboured' in the Bible

Then I looked on all the works that my hands had wrought, and on the labour that I had laboured to do: and, behold, all was vanity and vexation of spirit, and there was no profit under the sun.

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

And I turned round to cause my heart to despair concerning all the labour that I laboured at under the sun.

For there is a man whose labour is in wisdom, and in knowledge, and in equity; yet to a man that hath not laboured therein shall he leave it for his portion. This also is vanity and a great evil.

For what hath man of all his labour, and of the vexation of his heart, wherein he hath laboured under the sun?

And this also is a sore evil, that in all points as he came, so shall he go: and what profit hath he that hath laboured for the wind?