[When] he is about to fill his belly,.... Either in a literal sense, when he is about to take an ordinary meal to satisfy nature; or in a figurative sense, when he is seeking to increase his worldly riches, and his barns and coffers, and endeavouring to get satisfaction therein:[God] shall cast the fury of his wrath upon him; or "send it out on him" ; out of the treasures of it, which are laid up with him, De 32:34; into his conscience, and fill him with a dreadful sense and apprehension of it, and that with great force and violence, and cast it, and pour it on him like fire, or any scalding liquor, which is very terrible and intolerable.
This intends the indignation of God against sin, and his just punishment of it, according to the rigour of his justice; sometimes it is only a little wrath and displeasure he shows, he does not stir up all his wrath; but here it is threatened he will cast it, and pour it in great plenty, even "the fury" of it, in the most awful and terrible manner:and shall rain it upon him while he is eating; signifying, that the wrath of God shall be revealed from heaven against him, from whence rain comes; that it shall fall on him from above, unseen, suddenly, and at an unawares, and come with a force and violence not to be resisted, and in great abundance and profusion.