Solomon
Ecclesiastes 8:16ESV·traditional attribution

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,

Matthew Henry Presbyterian @wholebiblehenry

Wise and good men have, of old, been perplexed with this difficulty, how the prosperity of the wicked and the troubles of the righteous can be reconciled with the holiness and goodness of the God that governs the world. Concerning this Solomon here gives us his advice. I.

Commenting on Ecclesiastes 8:14-17

John Gill Reformed Baptist @doctorgill

When I applied mine heart to know wisdom,.... The nature and causes of things; the wisdom of God in his providence, and the grounds and reasons of his various dispensations towards the children of men: the Targum interprets it, the wisdom of the law; and to see the business that is done upon the earth; either the business of Providence, in dealing so unequally with...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Reply to Ecc 8:14-15. When I applied myself to observe man's toils after happiness (some of them so incessant as not to allow sufficient time for "sleep"), then (Ecc 8:17, the apodosis) I saw that man cannot find out (the reason of) God's inscrutable dealings with the "just" and with the "wicked" here (Ecc 8:14; Ecc 3:11; Job 5:9; Rom 11:33); his duty is to...