John Gill Bible Commentary

And your spoil shall be gathered like the gathering of the caterpillar,.... This is the answer of the Lord to the prayer of his church, signifying that their enemies should flee, be scattered, and perish, and that they should be victorious, and enjoy the spoils of them; which they should gather as easily as the caterpillar or locust, as some render it, gathers and consumes herbs, and every green thing; or as easily as they are gathered, and laid on heaps, being weak and unable to defend themselves: most understand it of the Jews going into the camp of the Assyrians, after the destruction of them by the angel, and gathering their spoil. The Targum is, "and the house of Israel shall gather the substance of the people, their enemies, as they gather a locust:'' the antichristian locusts or caterpillars are here meant, whose substance shall fall into the hands of the followers of Christ, when they shall have got the victory of them; this is the flesh of the whore, her worldly substance, which the kings of the earth, the Christian kings, shall eat or enjoy, Rev 17:16, as the running to and fro of locusts shall he run upon them: or "upon it"; the spoil; as these locusts, of which see Rev 9:3 run to and fro, and pillaged them in times past, as the creatures, to whom they are compared, run to and fro and destroy the fruits of the earth, so now everyone of the followers of Christ shall run and seize upon the spoil of the antichristian states.