Ecclesiastes 2:11

and I have looked on all my works that my hands have done, and on the labour that I have laboured to do, and lo, the whole is vanity and vexation of spirit, and there is no advantage under the sun!

Ecclesiastes 1:14

I have seen all the works that have been done under the sun, and lo, the whole is vanity and vexation of spirit!

Ecclesiastes 1:3

What advantage is to man by all his labour that he laboureth at under the sun?

Genesis 1:31

And God seeth all that He hath done, and lo, very good; and there is an evening, and there is a morning -- day the sixth.

Exodus 39:43

and Moses seeth all the work, and lo, they have done it as Jehovah hath commanded; so they have done. And Moses doth bless them.

Ecclesiastes 2:17-23

And I have hated life, for sad to me is the work that hath been done under the sun, for the whole is vanity and vexation of spirit.

Habakkuk 2:13

Lo, is it not from Jehovah of Hosts And peoples are fatigued for fire, And nations for vanity are weary?

1 Timothy 6:6

but it is great gain -- the piety with contentment;

1 John 2:16-17

because all that is in the world -- the desire of the flesh, and the desire of the eyes, and the ostentation of the life -- is not of the Father, but of the world,

Treasury of Scripture Knowledge

Summary

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.

Bible References

I looked

Ecclesiastes 1:14
I have seen all the works that have been done under the sun, and lo, the whole is vanity and vexation of spirit!
Genesis 1:31
And God seeth all that He hath done, and lo, very good; and there is an evening, and there is a morning -- day the sixth.
Exodus 39:43
and Moses seeth all the work, and lo, they have done it as Jehovah hath commanded; so they have done. And Moses doth bless them.
1 John 2:16
because all that is in the world -- the desire of the flesh, and the desire of the eyes, and the ostentation of the life -- is not of the Father, but of the world,

Behold

Ecclesiastes 2:17
And I have hated life, for sad to me is the work that hath been done under the sun, for the whole is vanity and vexation of spirit.
Ecclesiastes 1:3
What advantage is to man by all his labour that he laboureth at under the sun?
Habakkuk 2:13
Lo, is it not from Jehovah of Hosts And peoples are fatigued for fire, And nations for vanity are weary?
1 Timothy 6:6
but it is great gain -- the piety with contentment;

General references

Proverbs 14:13
Even in laughter is the heart pained, And the latter end of joy is affliction.
Ecclesiastes 1:2
Vanity of vanities, said the Preacher, Vanity of vanities: the whole is vanity.
Ecclesiastes 3:9
What advantage hath the doer in that which he is labouring at?