Idleness in Scripture is not rest — rest is good, commanded, and holy. Idleness is the refusal to do the work God has given you. "Idle hands are the devil's workshop" is not a biblical proverb in exactly those words, but it captures what Scripture teaches. Proverbs is relentless on the subject: "As a door turns on its hinges, so does the lazy man on his bed" (Proverbs 26:14). "The desire of the lazy man kills him, for his hands refuse to labor" (Proverbs 21:25). "A little sleep, a little slumber, a little folding of the hands to sleep — so shall your poverty come on you like a prowler, and your need like an armed man" (Proverbs 6:10-11). Paul was strict with the Thessalonians: "If anyone will not work, neither shall he eat" (2 Thessalonians 3:10). He was speaking about Christians who had stopped working, perhaps expecting Jesus to return soon. Paul's answer was not "we understand, rest until He comes" but "work with your own hands" (1 Thessalonians 4:11). The idle Christian lacks not just productivity but integrity: he is eating bread he has not earned and consuming charity that should go to those who cannot work. Idleness is not the absence of activity; the idle man is often very active in trivial things. It is the absence of productive labor at the calling God has given. The cure is simple: get up, get dressed, and do the next right thing.
2 Thessalonians 3:10-11 — "For even when we were with you, we commanded you this: If anyone will not work, neither shall he eat. For we hear that there are some who walk among you in a disorderly manner, not working at all, but are busybodies."
Proverbs 6:6-11 — "Go to the ant, you sluggard! Consider her ways and be wise, which, having no captain, overseer or ruler, provides her supplies in the summer, and gathers her food in the harvest."
Proverbs 13:4 — "The soul of a lazy man desires, and has nothing; but the soul of the diligent shall be made rich."
1 Timothy 5:13 — "And besides they learn to be idle, wandering about from house to house, and not only idle but also gossips and busybodies, saying things which they ought not."