Ecclesiastes 2:23 says the toiler's heart never rests at night — contrasting sharply with Ecc5:12's sweet sleep of the laborer.

Ecclesiastes 8:16 notes the wise observer sees no sleep — a different cause of sleeplessness from the rich's overindulgence in Ecc5:12.

Proverbs 3:24 promises sweet sleep to the wise — directly paralleling Ecc5:12's sweet sleep of the laborer as a blessing of contentment.

Psalm 127:2 warns anxious toil doesn't bring sleep; God gives sleep to his beloved — echoing Ecc5:12's contrast between laborer's sweet sleep and rich's restlessness.

Psalm 4:8 grounds peaceful sleep in trust in God, while Ecc5:12 attributes it to the laborer's simple life — both affirm rest as a gift.