Kabbalah sa Eclesiastes 6:7: Sha'arei Kedusha & Da'at Tevunot

Lust for pleasure is worse than all the negative traits mentioned above. For, if a person is gluttonous, he will come to fall to greed, theft, false oaths, hatred of the creatures and envy. Such a person is like Esav, who said,⁴⁶⁸Genesis 25:30 “Please pour some of that red red stuff into me.” About such a person it states,⁴⁶⁹Proverbs 23:2 (See Rashi) “If you care for your soul, it would be better for you to put a knife to your throat.” For out of gluttony he will eventually come to eat the meat of an animal that died without being slaughtered (Neveilah) or that has been slaughtered improperly (Treifah) and all other kinds of forbidden foods. Similarly, it is written,⁴⁷⁰Ecclesiastes 6:7 “All man’s toil is for his mouth,” and it states,⁴⁷¹Proverbs 13:25 “The stomach of the wicked will always be lacking.”

And you will see that this is what happened to man from the beginning, and to his progeny afterward to this day; for when it was that they followed their eyes and the body rules and not the soul, therefore the Holy One blessed is He also went with them in hiding of his countenance. And to Adam was said from the beginning "...by the sweat of your brow shall you eat bread" (Genesis 3:9), and from then and onward "all of the work of man is for his mouth, and also the soul shall not be filled" (Ecclesiastes 6:7). And behold wisdom became excluded and was removed from mankind: