'Wherein' in the Bible

What profit hath man of all his labor wherein he laboreth under the sun?

And I hated all my labor wherein I labored under the sun, seeing that I must leave it unto the man that shall be after me.

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.

Therefore I turned about to cause my heart to despair concerning all the labor wherein I had labored under the sun.

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

What profit hath he that worketh in that wherein he laboureth?

Behold, that which I have seen to be good and to be comely is for one to eat and to drink, and to enjoy good in all his labor, wherein he laboreth under the sun, all the days of his life which God hath given him: for this is his portion.

All this have I seen, and applied my heart unto every work that is done under the sun: there is a time wherein one man ruleth over another to his own hurt.

Enjoy life with the wife whom thou lovest all the days of the life of thy vanity, which he hath given thee under the sun, all the days of thy vanity; for that is thy portion in life, and in thy labour wherein thou art labouring under the sun.