The northern army. — Literally, him of the north. “This is an exception to the usual direction of the flight of locusts” (Stanley, Jewish Church), but it may be literally applied to the Assyrian hordes, whom the Jews generally spoke of as dwelling in the north. In Jeremiah 1:13 the symbolical caldron is represented as pouring its contents (the Chaldæan army) southwards from the face of the north. And even though the wind might be conceived as capriciously blowing the locusts from the north, yet the addition of the patronymic syllable to the Hebrew word indicates a native of the north, which excludes a reference to locusts. Under the image of the destruction of the locusts, the prophet points to the deliverance from the northern invaders.
The east sea is the Dead Sea; the utmost or hinder sea is the Mediterranean; the desolate land is the southern desert. The northern invader shall be expelled all along the coasts of Palestine. His stink shall come up. In the eighth plague of Egypt, when on the repentance of Pharaoh the locusts were removed, they were cast into the Red Sea, and there remained not one locust in all the coasts of Egypt (Exodus 10:19). In the present instance there is the result stated in the case of the decomposition of the bodies of the locusts left on the land: the air was infected with a horrible pestilence. There are various allusions to this terrible result of their putrefaction in the writers who describe the horrors of a plague of locusts. St. Jerome tells of the awful sufferings inflicted on man and beast through this cause; and St. Augustine (De Civitate Dei, iii. 31) relates that eight hundred thousand men perished from this reason in the kingdom of Masinissa alone, besides many more near the coast. Thus Joel declares the complete destruction of the enemies of Israel, who having completed the purpose of vengeance for which they were summoned, and, like the Assyrians under the walls of Jerusalem, having exalted themselves against the Lord, perish miserably under the stroke of His power.