He gave them their desire There is a fine paronomasia in the word rzvn, razon, for if, instead of z, zain, we read ts, tsädhé, the word would signify good pleasure. The prophet, therefore, in allusion to their lusting, by a word which is very similar to good pleasure or desire, says that God sent leanness into their souls; meaning by that, that he had indeed gratified the inordinate desires of the people, in such a way, however, as that those who had loathed the manna, now received nothing but leanness. [1] Thus the prophet would seem to charge the people with what we daily observe among those who live luxuriously and are fastidious, especially when their stomach, in consequence of the fluids poured into it, being vitiated, has no relish for wholesome food. For such persons only relish that food which is pernicious; and, therefore, the more they pamper themselves with it, so much the more do they become the creatures of noxious habits; and thus in a very short time, the very food itself makes them pine away. The prophet, seems, therefore, to apply to the mind what he says about the unhealthy state of the body, and to compare the Jews to those morbid persons, whose voraciousness, instead of promoting health, injures it, because they do not derive any nourishment from their food. The reason is, that God withheld his blessing from the food which they had so immoderately longed for, in order that this their punishment for their transgression might humble them. But their perversity is seen to be very great, in that even this mode of punishing them did not overcome their stubborn hearts. It is a proverbial saying, that fools learn wisdom from the experience of evil. How insane and incorrigible must they have been, whom even compulsion itself could not reform!

Footnotes

1 - The reference here is to the quails which God granted to the people in answer to their request for flesh, but which, from the excess in which they partook of them, so far from affording nourishment, proved the cause of disease. When food of an unwholesome quality, or too much of that which is wholesome, is eaten, nature with much violence seeks to throw it off from the system by the several evacuations, upon which follows a sudden and almost incredible deprivation of strength and flesh. The Israelites, when God gave them the quails, having indulged their appetite to an immoderate degree, (Exodus 16:8; Psalm 78:25, 29,) the effect was their being seized with a sudden and wasting sickness, which is supposed by some to have been what is called cholera, a disease which produces a rapid prostration of strength and emaciation of the whole frame. This opinion seems confirmed from what is stated in Numbers 11:20, where it is threatened that the quails should "come out at their nostrils," probably indicating the violent vomitings which accompany that malady. It is indeed said, that the Lord smote the people with a very great plague, Numbers 11:33. But God's agency, and even his miraculous agency, admits of the subserviency of means. French and Skinner read the clause, "But sent a wasting disease among them." "The word rzh, to attenuate, emaciate," says Hammond, "is used also for destroying, Zephaniah 2:11, when God threatens that he will emaciate, i.e., destroy all the gods. And then rzvn, may be rendered, more generally, destruction or plague, and so R. Tanchum on Zephaniah renders it destruction."

And he gave them their request - By sending great quantities of quails. Numbers 11:31-32.
But sent leanness into their soul - The word translated "leanness" is from a verb - רזה râzeh - to make thin; to cause to waste away; to destroy. The radical idea is that of abrading or "scraping;" and hence, it means to become lean, to waste away. It occurs only here and in Isaiah 10:16, rendered "leanness," and in Micah 6:10, rendered "scant;" margin, "leanness." It means here that the effect of all this on their souls was similar to the effect on the body when it wastes away by disease or want of food. This effect often occurs. In the gratification of their desires, in great temporal success and prosperity, individuals, churches, nations, often forget their dependence on God; lose their sense of the value of spiritual privileges and blessings: are satisfied with their condition; become selfconfident and proud, and forfeit the favor of God. If we pray for temporal prosperity, we should also pray that we may at the same time have grace commensurate with it, that it may be a blessing and not a curse; if we are visited with prosperity when it has not been a direct object of our prayer - if we inherit riches, or if our plans are successful beyond our expectations - or, in the language of the world, if "fortune smiles upon us," there should be special prayer on our part that it may not be a curse rather than a blessing; that it may be so received and used as not to alienate our minds from God. Few are the Christian people who can bear continued success in life; few are those who are not injured by it; rare is it that growth in grace keeps pace with uninterrupted worldly prosperity; rare is it that the blessings of earth are so received and employed that they are seen to be a means of grace, and not a hindrance to growth in piety. A man does not know what is best for him when his heart is set on worldly prosperity; and God is more benevolent to people than they are to themselves, in withholding what is so often the object of their intense desire. "What is asked in passion, is often given in wrath" - Henry.

Sent leanness - They despised the manna, and called it light, that is, innutritive, bread. God gave flesh as they desired, but gave no blessing with it; and in consequence they did not fatten, but grew lean upon it. Their souls also suffered want.

And he gave them their request; but sent (h) leanness into their soul.
(h) The abundance that God gave them did not profit, but made them pine away, because God cursed it.

And he gave them their request,.... Flesh and feathered fowl in great abundance; see Psalm 78:27. So God sometimes gives to wicked men what they ask for, as much as they can desire, yea, more than heart could wish.
But sent leanness into their soul: or "body"; the Septuagint, Vulgate Latin, and all the Oriental versions, read, "he sent fulness into their souls"; he gave them flesh to the full, even to a nausea; they fed too heartily on it, and were surfeited with it; which not being digested brought a repletion, and issued in a consumption; or rather death, immediate death, is meant, as Jarchi, Aben Ezra, Kimchi, and Ben Melech, interpret it; for while the flesh was in their mouths, and they were chewing it between their teeth, the wrath of God came upon them and slew them, Numbers 11:33. It is true in a spiritual sense, that while the bodies of wicked men are fed and pampered, their souls are starved, and at last eternally lost; as the rich man's in the Gospel, who fared sumptuously every day: and worldly professors are very lean ones; such who mind earth and earthly things never thrive in spirituals; and either they soon drop their profession, err from the faith, and turn apostates; or, if they continue, the cares of the world, and the deceitfulness of riches, choke the word; so that it is unprofitable to them, not being mixed with faith by them; and hence leanness under the best of means: yea, there is sometimes a leanness in the souls of the people of God, when corruptions prevail, the graces of the spirit are low in exercise; when there is a want of a spiritual appetite to the word; and when they fall into bad company, or do not improve conversation with one another in a spiritual way; or are too much taken up, ensnared, and entangled with the things of the world; see Isaiah 24:16.

but sent leanness--rather, "and sent," that is, and thus, even in doing so, the punishment was inflicted at the very time their request was granted. So Psalm 78:30, "While their meat was yet in their mouths, the wrath of God came upon them."
soul--the animal soul, which craves for food (Numbers 11:6; Psalm 107:18). This soul got its wish, and with it and in it its own punishment. The place was therefore called Kibroth-hattaavah, "the graves of lust" [Numbers 11:34], because there they buried the people who had lusted. Animal desires when gratified mostly give only a hungry craving for more (Jeremiah 2:13).

Souls - Into their bodies. So their inordinate desire of pampering their bodies, was the occasion of destroying them.