John Chrysostom
After discussing the terror these nations inspire and the speed of their forces, he now reflects on their vast numbers. He does not state that they will engage in battle; rather, he describes them as leisurely settling in, as if they had not entered an adversarial land, but instead were basking in their own domain. They are depicted as untroubled by exhaustion or toil, instead preparing for an easy triumph and amassing the spoils of victory. Hence, it is said that "they will come and sit down," a phrase that signifies a state of repose typical of victors who have established a monument to their conquest, finding respite after numerous victories and carnage. Their rest will not merely be in the fields; given their vast numbers, the land will be unable to accommodate them all.
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Consequently, the bodies of the defeated will lay stretched across the valleys, hills, mountains, and forests, completely covering the landscape. Were they not so powerful and swift, their high numbers alone would have sufficed to overpower the Israelites. However, when such strength is joined with their great numbers and, most dreadfully, when they are driven by divine wrath, what possibility of salvation could remain? The phrase "in every thorny bush and in every tree" might seem exaggerated. It is clear they won’t find rest in trees, but, as previously mentioned, the prophet indulges in hyperbole. He continues by drawing a parallel with wasps.