Ecclesiastes 1:12-14 New American Standard Bible (NASB)

12. I, the Preacher, have been king over Israel in Jerusalem.

13. And I set my mind to seek and explore by wisdom concerning all that has been done under heaven. It is a grievous task which God has given to the sons of men to be afflicted with.

14. I have seen all the works which have been done under the sun, and behold, all is vanity and striving after wind.

Ecclesiastes 1