John Gill's Exposition of the Whole Bible
2 Samuel 17:10
And he also [that is] valiant, whose heart is as the heart of a lion, shall utterly melt,.... That is, whoever should hear of Absalom's forces, or a part of them, being routed, would be intimidated, though ever so courageous, or of such a lion-like temper and disposition; and even Ahithophel himself, notwithstanding all his boasted courage, his heart would fail, he would melt like water h, Joshua 7:5; should he meet with such a rebuff at first setting out. A lion is well known for its courage as well as strength, and has not only a fierce countenance, hence we read of lion-like men in their faces, 2 Samuel 23:20; but has a courageous heart, and from thence it is thought to have its name Labi, from "leb", which signifies the heart; so Hercules is represented by the poet as having a lion's heart i, and others also; though Leo Africanus k relates of some lions in Africa that are so naturally fearful that they will flee at the cry of children, particularly at a place called Agla; hence it became a proverb with the inhabitants of Fez to call blustering cowards the lions of Agla; and he speaks of great numbers of lions elsewhere l, who are easily driven away with a small stick by the most timorous persons; but for the most part lions are very bold and daring, as well as strong, to which the allusion is here. Some apply this to David himself, who was a valiant man, and whose heart was like that of a lion, and so read the last clause with an interrogation: "shall he utterly melt?" no, he will not; he is not to be made afraid so easily as Ahithophel has intimated:
for all Israel knoweth that thy father [is] a mighty man, and [they] which be with him [are] valiant men: this is so universally known that it cannot be denied.
h ----ηυτε λειβεαι υδωρ, Moschi Idyll 2. ver. 45. i θυμολεοντα Homer. Iliad. 5. ver 639. Iliad. 7. ver. 228. Odyss. 11. ver. 279. Vid. Hesiod. Theogoniam prope finem. k Descriptio Africae, l. 3. p. 400. l Ib. p. 474.