Ecclesiastes 8:16-17 Revised Version 1885 (RV1885)

16. When I applied mine heart to know wisdom, and to see the business that is done upon the earth: (for also there is that neither day nor night seeth sleep with his eyes:)

17. then I beheld all the work of God, that man cannot find out the work that is done under the sun: because however much a man labour to seek it out, yet he shall not find it; yea moreover, though a wise man think to know it, yet shall he not be able to find it.

Ecclesiastes 8