Keil & Delitzsch, on Prov 20:17

“The bread of lying is sweet to a man: but afterwards his mouth shall be filled with gravel.”

“17 Sweet to a man is the bread of deceit; Yet at last his mouth is full of gravel. "Bread of deceit" is not deceit itself, as that after which the desire of a man goes forth, and that for which he has a relish (thus, e.g., Immanuel and Hitzig); but that which is not gained by labour, and is not merited. Possession (vid., Pro 4:17) or enjoyment (Pro 9:17) obtained by deceit is thus called, as לחם כּזבים, Pro 23:3, denotes bread; but for him who has a relish for it, it is connected with deceit. Such bread of lies is sweet to a man, because it has come to him without effort, but in the end not only will he have nothing to eat, but his tongue, teeth, and mouth will be injured by small stones; i.e., in the end he will have nothing, and there will remain to him only evil (Fleischer). Or: it changes itself (Job 20:14) at last into gravel, of which his mouth is filled full, as we might say, "it lies at last in his stomach like lead." חצץ is the Arab. ḥaṭny, gravel (Hitzig, grien = gries, coarse sand, grit), R. חץ, scindere. Similarly in Arab. ḥajar, a stone, is used as the image of disappointed expectations, e.g., the adulterer finds a stone, i.e., experiences disappointment.”

Imported from an open dataset — not yet checked against the printed edition.