Charles Ellicott Commentary Proverbs 18:9

"He also that is slack in his work Is brother to him that is a destroyer." — Proverbs 18:9 (ASV)

He also that is slothful in his work.— Whatever it may be that is committed to his care, is “brother to him that is a great waster,” or “destroyer”; neglect of duty causes almost as much mischief in life as active wickedness.