Ecclesiastes 5:12
The sleep of a labouring man is sweet, whether he eat little or much: but the abundance of the rich will not suffer him to sleep. The sleep of a labouring man is sweet, whether he eat little or much: but the abundance of the rich will not suffer him to sleep.
Rest after a well-spent day of honest, physical, well-regulated, diligent and proper work is sweet, satisfying, refreshing and restoring. Well-regulated labor brings a healthful weariness, and proper labor brings weariness followed by sweet sleep that restores. Honest labor brings its own fitting reward in this rest.
This holds whether the laborer eats little or much, while the abundance of the rich will not allow him to sleep and rest. Riches and idleness bring no greater happiness or health, and those who labor diligently enjoy greater happiness and health. Labor is thus an antidote for sleeplessness, and physical labor brings sweet sleep. Rest after a suitable amount of work invigorates the tired body and prepares it refreshed for the next day's duties. This is seen when children do healthful physical work, happy to be useful, and sleep well afterward, refreshed for the next day's work.
By contrast, toil driven by excessive, selfish striving and ambition for wealth, possessions or honor for display gives no lasting satisfaction. Making everything else secondary and pursuing possessions or honor beyond their proper place consumes strength yet leaves the promised reward empty. Even when the goal is reached the reward proves empty and does not repay the life spent on it. The toil required to earn daily bread is a blessing, as is the promise of future happiness and glory.