ESV: When I applied my heart to know wisdom, and to see the business that is done on earth, how neither day nor night do one 's eyes see sleep,
NIV: When I applied my mind to know wisdom and to observe the labor that is done on earth—people getting no sleep day or night—
NASB: When I devoted my mind to know wisdom and to see the business which has been done on the earth (even though one should never sleep day or night),
CSB: When I applied my mind to know wisdom and to observe the activity that is done on the earth (even though one’s eyes do not close in sleep day or night),
NLT: In my search for wisdom and in my observation of people’s burdens here on earth, I discovered that there is ceaseless activity, day and night.
KJV: 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:)
NKJV: When I applied my heart to know wisdom and to see the business that is done on earth, even though one sees no sleep day or night,