Ecclesiastes 8:7 notes human ignorance of the future—a limitation that makes the search for wisdom in 8:16 challenging.

Ecclesiastes 8:9 describes the same 'applied my mind' observation of human lordship—both are part of the same reflective passage.

Ecclesiastes 2:23 depicts sleepless nights from toil—the same condition 8:16 observes in those who 'see no sleep day or night.'

Ecclesiastes 7:25 echoes the same quest 'to understand, investigate, and search out wisdom'—nearly identical to 8:16's pursuit.

Ecclesiastes 1:13 also describes applying the mind to wisdom — a direct parallel to this verse's opening.

Ecclesiastes 4:8 describes a lonely toiler who never rests and denies himself enjoyment—illustrating the sleepless labor 8:16 observes.

Ecclesiastes 5:12 contrasts the laborer's sweet sleep with the rich's sleeplessness — here the toil of seeking wisdom also brings sleeplessness.

Job 28:13 says wisdom's worth is beyond human comprehension — this pursuit of wisdom also ends in mystery.

Proverbs 2:2 urges applying the heart to understanding — the same posture of seeking wisdom as in this verse.

Proverbs 22:17 calls for applying the heart to wise teachings — echoing the mental effort described here.

Psalm 127:2 declares that God gives sleep to the beloved — contrasting with the sleepless striving for wisdom here.