For, lo, the kings were assembled - There is evidently allusion here to some fact that had occurred; some gathering together of kings and their armies, with a view to besiege or attack Jerusalem. The kings referred to, if the allusion here is, as is supposed, to the time of Jehoshaphat, were the kings of Ammon and of Moab, and of Mount Seir, and perhaps others, not particularly mentioned, who came up against Jehoshaphat, 2 Chronicles 20:1, 2 Chronicles 20:10.
They passed by together - That is, they were smitten with consternation; they were so impressed with the beauty, the majesty, the strength of the city, that they passed along without venturing to attack it. Or, perhaps, the meaning may be, that they were discomfited and overthrown as suddenly “as if” the mere sight of the city had filled their minds with dread, and had made them desist from their intended assault. Compare 2 Chronicles 20:22-25.