IV. A description of the alarm which should be given to Babylon upon its being forced by Cyrus and Darius. The Lord, in vision, showed the prophet the watchman set in his watch-tower, near the watch-tower, near the palace, as is usual in times of danger; the king ordered those about him to post a sentinel in the most advantageous place for discovery, and, according to the duty of a watchman, let him declare what he sees, v. 6. We read of watchmen thus set to receive intelligence in the story of David (2 Sam. xviii. 24), and in the story of Jehu, 2 Kings ix. 17. This watchman here discovered a chariot with a couple of horsemen attending it, in which we may suppose the commander-in-chief to ride. He then saw another chariot drawn by asses or mules, which were much in use among the Persians, and a chariot drawn by camels, which were likewise much in use among the Medes; so that (as Grotius thinks) these two chariots signify the two nations combined against Babylon, or rather these chariots come to bring tidings to the palace; compare Jer. li. 31, 32. One post shall run to meet another, and one messenger to meet another, to show the king of Babylon that his city is taken at one end while he is revelling at the other end and knows nothing of the matter. The watchman, seeing these chariots at some distance, hearkened diligently with much heed, to receive the first tidings. And (v. 8) he cried, A lion; this word, coming out of a watchman's mouth, no doubt gave them a certain sound, and everybody knew the meaning of it, though we do not know it now. It is likely that it was intended to raise attention: he that has an ear to hear, let him hear, as when a lion roars. Or he cried as a lion, very loud and in good earnest, the occasion being very urgent. And what has he to say? 1. He professes his constancy to the post assigned him: "I stand, my lord, continually upon the watch-tower, and have never discovered any thing material till just now; all seemed safe and quiet." Some make it to be a complaint of the people of God that they had long expected the downfall of Babylon, according to the prophecy, and it had not yet come; but withal a resolution to continue waiting; as Hab. ii. 1, I will stand upon my watch, and set me upon the tower, to see what will be the issue of the present providences. 2. He gives notice of the discoveries he had made (v. 9): Here comes a chariot of men with a couple of horsemen, a vision representing the enemy's entry into the city with all their force or the tidings brought to the royal palace of it.