The fool folds his hands and eats his own flesh.
Here Solomon returns to the observation and consideration of the vanity and vexation of spirit that attend the business of this world, which he had spoken of before, Ecc 2:11. I. If a man be acute, and dexterous, and successful in his business, he gets the ill-will of his neighbours, Ecc 4:4.
Commenting on Ecclesiastes 4:4-6
The fool foldeth his hands together,.... In order to get more sleep, or as unwilling to work; so the Targum adds, "he folds his hands in summer, and will not labour;'' see Pro 6:10. Some persons, to escape the envy which diligence and industry bring on men, will not work at all, or do any right work, and think to sleep in a whole skin...
Still the fool (the wicked oppressor) is not to be envied even in this life, who "folds his hands together" in idleness (Pro 6:10; Pro 24:33), living on the means he wrongfully wrests from others; for such a one eateth his own flesh--that is, is a self-tormentor, never satisfied, his spirit preying on itself (Isa 9:20; Isa 49:26).