Jeremiah 46:23

Or, “They have cut down her forest, saith Yahweh, for it is impenetrable,” i. e., just as a pathless forest must be cleared to assist agriculture and the passage to and fro of men, so must the false worship and the material prosperity of Egypt be overthrown.

Grasshoppers - The invading host advances as multitudinous as the locusts which consume the whole vegetation of the land on which they alight.