Joel 1:6

For a nation is come up— A word of consideration concerning the locusts may not be altogether improper, says Dr. Sharpe in his Second Argument, &c. And as the commentators are divided in their opinions, it will be but fair to give a brief view of what has been said on both sides. To begin then with Grotius, Houbigant, Rabbi Tanchum, Abarbanel, &c. they are of opinion, that the prophet has used this image to set forth the multitude of the Chaldean army; but then Bochart and others, on the contrary, assert, that it is an army of real locusts, and not of men. Some, as Cyril and Theodoret, have interpreted it of both. Jerome informs us, that some of the Jews before his time understood this description of the locusts to be figurative, and to mean the most powerful enemies of the Jews: and he himself is forced to confess, that while you read of locusts, you think of the Babylonians. The force of the Chaldeans (says he) is described under the metaphor of locusts. This interpretation is favoured also by the Chaldee. Pocock has, with great learning and diligence, endeavoured to prove, that locusts, not men, are here described by the prophet; and then, after such his literal interpretation, he allows it will be lawful for any to apply them to such things as he pleases. Throughout the prophesies of Daniel, kings, kingdoms, and forces, are represented under the names and parts of animals; the lion, bear, ram, goat, horns, wings. The king of Egypt is represented, Isaiah 27:1 by leviathan, the crooked serpent; the literal meaning is, "The crocodile of the Nile:" the real import is Psammeticus, king of Egypt, taken prisoner by Cambyses. The army of Nebuchadnezzar is compared to locusts (grasshoppers in our version), Jeremiah 46:23 which is a common metaphor for numerous and destructive armies, as the reader may see by comparing Isaiah 33:4.Judges 6:5; Judges 7:12. It may therefore be presumed, that, under the metaphor of locusts, Joel describes the army of the Chaldeans; and this presumption is moreover favoured by several circumstances in the description. The locusts were of four kinds; and the enemies appointed over the Jews were of four kinds, Jeremiah 15:2. Jerome, with other interpreters, suppose the succession of these insects to mean the four several attacks of the Chaldeans: that is to say, first, in the last year of Nabopolassar, and third of Jehoiachim; secondly, when that king was taken prisoner, in the eleventh year of his reign; thirdly, in the ninth of Zedekiah; fourthly, about three years after, when Jerusalem was destroyed by Nebuchadnezzar. To conclude, we may with Bishop Warburton regard this as a double prophesy, and consider that Joel in his prediction of an approaching ravage by locusts, foretels likewise, in the same word, a succeeding desolation by the Assyrian army; for we are to observe, that this was God's method both in warning and punishing a sinful people. Thus when the seven nations, for their exceeding wickedness, were to be exterminated, God promises his chosen nation to send hornets before them,&c. See Exodus 23:28 and Wis 12:8, &c. Now Joel, under one and the same prediction, contained in this and the following chapter, foretels both these plagues; the locusts in the primary sense, and the Assyrian army in the secondary. See Div. Leg. book 6: sect. 6 and the note on chap. Joel 2:20.