Psalms 106:15

“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…”

“Souls - Into their bodies. So their inordinate desire of pampering their bodies, was the occasion of destroying them. Psalms 106:16”

“106:15 he sent a plague: See Exod 32:35; Num 11:33.”

“he gave: Psa 78:29-31; Num 11:31-34; Isa 10:16, Isa 24:16 but sent: They despised the manna, calling it light or innutritive food. God gave them flesh as they desired, but no blessing accompanied it; and, in consequence, they did not fatten, but grew lean upon it; and many, surfeited by excess, died of disease. Instead of razon, "leanness," however, Bp. Lowth supposes we should read zeraon, "nausea or loathing," which appears to be supported by several ancient versions, and by Num 11:20, where this portion of the history of the Israelites is recorded, and where the word zara is used, and rendered, "it be loathsome. Psalms 106:16”