Matthew Henry on Joshua 8:3-22
We have here an account of the taking of Ai by stratagem. The stratagem here used, we are sure, was lawful and good; God himself appointed it, and we have no reason to think but that the like is lawful and good in other wars. Here was no league broken, no treaty of peace, that the advantage was gained; no, these are sacred things, and not to be jested with, nor used to serve a turn; truth, when once it is plighted, becomes a debt even to the enemy. But in this stratagem here was no untruth told; nothing was concealed but their own counsels, which no enemy ever pretended a right to be entrusted with; nothing was dissembled, nothing counterfeited but a retreat, which was no natural or necessar…
Read the whole note in the consoleJamieson-Fausset-Brown on Joshua 8:18
Joshua stretched out the spear that he had in his hand toward the city--The uplifted spear had probably a flag, or streamer on it, to render it the more conspicuous from the height where he stood. At the sight of this understood signal the ambush nearest the city, informed by their scouts, made a sudden rush and took possession of the city, telegraphing to their brethren by raising a smoke from the walls. Upon seeing this, the main body, who had been reigning a flight, turned round at the head of the pass upon their pursuers, while the twenty-five thousand issuing from their ambuscade, fell back upon their rear. The Ai-ites surprised, looked back, and found their situation now desperate.
Adam Clarke on Joshua 8:20
They had no power to flee this way or that way - They were in utter consternation; they saw that the city was taken, they found themselves in the midst of their foes; that their wives, children, and property, had fallen a prey to their enemies, in consequence of which they were so utterly panic-struck as to be incapable of making any resistance.
John Gill on Joshua 8:21
And when Joshua,.... Or "for Joshua" (z):
and all Israel saw that the ambush had taken the city; which they knew by the smoke, as follows:
and that the smoke of the city ascended; in large columns, which sufficiently indicated that the whole city was taken and fired by the ambush:
then, or, "and":
they turned again and slew the men of Ai; great numbers of them.
(z) "et enim Josua", Junius & Tremellius, Piscator; so Masius.