NET

16 When I tried to gain wisdom and to observe the activity on earth—even though it prevents anyone from sleeping day or night—

Darby

Human Wisdom has Its Limitations

16 When I applied my heart to know wisdom, and to see the business^D4531 that is done upon the earth (for also there is that neither day nor night seeth sleep with his eyes),

Darby Bible Notes

business - Or 'travail,' as ch. 2.23.

KJV

Human Wisdom has Its Limitations

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:)

Strong's

16 When I applied^H5414 mine heart^H3820 to know^H3045 wisdom^H2451, and to see^H7200 the business^H6045 that is done^H6213 upon the earth^H776 :(for also there is that neither day^H3117 nor night^H3915 seeth^H7200 sleep^H8142 with his eyes^H5869:)