24 It shall be, when you hear the sound of marching in the tops of the mulberry trees, that then you shall stir yourself up; for then Yahweh has gone out before you to strike the army of the Philistines."
*Minor differences ignored. Grouped by changes, with first version listed as example.
When thou hearest the sound of a going - If there had not been an evident supernatural interference, David might have thought that the sleight or ruse de guerre which he had used was the cause of his victory. By the going in the tops of the mulberry trees probably only a rustling among the leaves is intended. The Targum says, a noise; the Arabic has it, the noise of horses' hoofs.
And let it be, when thou hearest the sound of a going in the tops of the mulberry trees,.... Of a going of the wind on the tops of these trees, making a rustling upon them, and that in such a manner as to resemble the going of men, or march of armies, as if they were moving in the air over the tops of the mulberry trees; which Jarchi and R. Isaiah interpret of angels being sent of God, and moving at that time to help David, and destroy the Philistines; so the Targum on 1-Chronicles 14:15. These trees being in Judea account for silk there, Ezekiel 16:10; though some think time was not known so early; others suppose it was, and to be the Hebrew byssus mentioned by Pausanias (a), as being of a yellow colour:
that then thou shall bestir thyself; or move towards the camp of the Philistines, and fall upon them in the rear, who, by reason of the sound in the trees, would not hear the motion of the Israelites; or, if they heard it, would take it to be no other than the motion of the trees they heard, both sounds being confounded together; or they would take the sound they heard for the motion of the enemy in the front, and give way, and so fall into the hands of the Israelites in their rear, which must throw them into the utmost confusion and consternation:
for then shall the Lord go out before thee to smite the host of the Philistines: by an angel or angels; so the Targum,"for then shall go forth the angel of the Lord, to make thee prosperous to slay in the camp of the Philistines;''
that being the precise time for the salvation of Israel, and the destruction of the Philistines, and the token of it.
(a) Eliac. sive, l. 5. p. 294.
the sound of a going in the tops of the mulberry trees--now generally thought not to be mulberry trees, but some other tree, most probably the poplar, which delights in moist situations, and the leaves of which are rustled by the slightest movement of the air [ROYLE].
"And when thou hearest the rush of a going in the tops of the baca-shrubs, then bestir thyself," or hasten; "for Jehovah has gone out before thee, to smite the army of the Philistines." "The sound of a going," i.e., of the advance of an army, was a significant sign of the approach of an army of God, which would smite the enemies of Jehovah and of His servant David; like the visions of Jacob (Genesis 32:2-3) and Elisha (2-Kings 6:17). "Then thou shalt bestir thyself," lit. be sharp, i.e., active, quick: this is paraphrased in the Chronicles by "then thou shalt go out to battle."
The sound - A noise as it were of persons walking upon the tops of them, which I shall cause; and by this sign, both thou shalt he assured that I am coming to help thee; and the Philistines shall be affrighted, and not perceive the noise of thy army, until thou art upon them. Bestir - Fall upon them.
*More commentary available at chapter level.