He shall not feel quietness in his belly, i.e. he shall have no peace nor satisfaction in his mind in all his gains, partly because of his perpetual fears and expectations of the wrath of God and man, which his guilty conscience knoweth that he deserves; and partly because they shall be speedily taken away from him. He still continueth the metaphor of a glutton, whose belly is not quiet until it hath vomited up that wherewith he had oppressed it. Of that which he desired, i.e. any part of his good and desirable things, but he shall forfeit and lose them all.
Related Commentaries of Job 20:20
Job 20:20
20 Surely he shall not feelg quietness in his belly, he shall not save of that which he desired.