C. F. Keil and Franz Delitzsch on Proverbs 16:24

Pro 16:24 24 A honeycomb are pleasant words,      Sweet to the soul, and healing to the bones.

Honeycomb, i.e., honey flowing from the צוּף, the comb or cell (favus), is otherwise designated, Psa 19:11. מתוק, with מרפּא, is neut. אמרי־נעם are, according to Pro 15:26, words which love suggests, and which breathe love. Such words are sweet to the soul of the hearer, and bring strength and healing to his bones (Pro 15:30); for מרפא is not only that which restores soundness, but also that which preserves and advances it (cf. θεραπεία, Rev 22:2).