There is no doubt but that the Prophet speaks of Babylon. But it may seem strange to call it a mountain, when that city was situated in a plain, as it is well known; nay, it has no mountains near it. It was a plain, so that streams might be drawn here and there in any direction. Hence they think that the city was called a mountain on account of the height of its walls and also its great buildings. And this is probable, as though the Prophet called it a great mass; for historians tell us that its walls were very high, about two hundred feet, and a foot commonly exceeded three fingers. Then the towers were very high. In short, Babylon was a prodigy for the quantity of its bricks, for the walls were not built with squared stones, but formed of bricks. Their breadth also was incredible; for chariots drawn by four horses could go along without touching one another. Their breadth, according to Strabo and also Pliny, was fifty feet. Then this metaphor was not used without reason, when the Prophet, regarding in one respect the state of the city, called Babylon a mountain, as though Ninus, or Semiramis, or others, had contended with nature itself. The beginning of Babylon was that memorable tower mentioned by Moses, but then the work was left off. (Genesis 11) Afterwards, either because such a beginning inflamed the desire of men, or because the place was very pleasant and fertile, it happened that a city of great size was built there. In short, it was more like a country than a city; for, as Aristotle says, it was not so much a city as a country or a province. This much as to the word mountain.

Now God himself declares war against Babylon, in order that more credit might be given to this prophecy; for the Prophet had no regard to the Chaldeans, but to his own nation, and especially to the remnant of the godly. The greater part derided his prophecy, but a few remained who received the Prophet's doctrine with becoming reverence. It was then his object to consult their good and benefit; and, as we shall see at the end of this chapter, he wished to lay up this treasure with them, that they might cherish the hope of restoration while they were as it were lost in exile. God then does here encourage them, and declares that he would be an enemy to the Babylonians.

Behold, he says, I am against thee, O mountain of perdition. The mountain of perdition is to be taken in an active sense, for destroying mountain, as also a clearer explanation follows, when he says that it had destroyed all the earth. For the Babylonians, as it is well known, had afflicted all their neighbors, and had transferred the imperial power of the Medes to their own city. When they subdued the Assyrians they extended their power far and wide, and at length advanced to Syria, Judea, and Egypt. Thus it happened that the Babylonians enjoyed the empire of the east till the time of Cyrus; and then the monarchy was possessed by the Persians. But our Prophet had respect to the former state of things; for he said that the Chaldeans had been like a hammer, which God had employed to break in pieces all the nations; and, according to the same meaning, he now says that all the earth had been destroyed by the Babylonians.

But God here declares that he would be their judge, because he would extend his hand over Babylon, and roll it down from the rocks, he proceeds still with the same metaphor; for as he called Babylon a mountain on account of its great buildings, and especially on account of its high walls and lofty towers, so now he adopts the same kind of language, I will cast thee down, or rather roll thee, from the rocks, and make thee a mountain of burning. He thus intimates that Babylon would become a heap of ashes, though this was not immediately fulfilled; for as we have said, it was so taken as not to be entirely laid waste. For in the time of Alexander the Great, many years after, Babylon was standing, and there Alexander died. It then follows that it was not reduced to solitude and ashes by Darius and Cyrus. But we have already untied this knot, that is, that the Prophet does not only speak of one vengeance of God, but includes others which followed. For Babylon soon after revolted and suffered a grievous punishment for its perfidy, and was then treated with great contempt. Afterwards, Seleucus tried in various ways to destroy it, and for this end Seleucia was built, and then Ctesiphon was set up in opposition to Babylon. Babylon then was by degrees reduced to that solitude of which the Prophet here speaks. Pliny says that in his time the temple of Bel was there, whom they thought to have been the founder of the city; but he afterwards adds that the other parts of the city were deserted. If Jerome, as he says, visited it, we ought; to believe what he had seen; and he says that Babylon was a small ignoble town, and ruins only were seen there. There is, then, nothing unreasonable in this prophecy, for it ought not to be restricted to one calamity only; for God ceased not in various ways to afflict Babylon until it was wholly laid waste, according to what our Prophet testifies. According to this view, then, he says that Babylon would become a mountain of burning, or a burnt mountain, ¹ for ruins only would remain; and in the same sense he immediately adds, --