The voracious appetite of four kinds of locust, or perhaps of four different stages in the locust life cycle, are used to form a highly descriptive expression for complete devastation—nothing remains after they sweep by. The three parallel lines of this verse are a bald statement, the content of which is independent of vv. 2–3 and v. 5, and the verse has all the flavor of a traditional aphorism. This, together with a reference to all four locusts again
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