Lift ye up a banner upon the high mountain. The word mountain contains a metaphor; for the discourse relates to Babylon, which, we know, was situated on a plain; but with a view to its extensive dominion, he has assigned to it an elevated situation, like a fortress set on high above all nations. But perhaps it will be thought better to take the word mountain as used indefinitely; as if he had said, "When a signal is given there will be a vast assemblage from very distant countries, because all men will be attracted towards it by the wide and extensive influence of the sight;" and, indeed, I consider this opinion to be more probable, but I chose to mention at first the opinion which had been commonly received. Yet it might be thought absurd that the Prophet here enjoins the creatures to yield, as it were, obedience to him, if God had not fortified the Prophet by his instructions and authority. A private man here commands the Medes and Persians, assembles armies, orders a banner to be lifted up, and sounds the trumpet for battle. This should therefore lead us to consider the majesty of God, in whose name he spoke, and likewise the power and efficacy which is always joined with the word. Such modes of expression are frequently found in the Prophets, that, by placing the events as it were before our eyes, he may enable us to see that God threatens nothing by his servants which he is not ready immediately to execute. Isaiah might indeed have threatened in plain and direct terms, "The Persians and Medes will come, and will burst through the gates of Babylon, notwithstanding the prodigious strength of its fortifications." But those exclamations are far more energetic, when he not only assumes the character of a herald and proclaims war, but, as if he exercised the highest authority, orders the Medes and Persians to assemble like hired soldiers. Not only does he show that they will be ready at the bidding of God, because they are moved by his secret influence; but, having been sent by God to announce the ruin of Babylon, he claims for his own voice the accomplishment of what appeared to be beyond belief. It amounts to this, "When God hath spoken about what shall happen, we ought to entertain no doubt concerning it." It deserves our notice also, that he describes the Persians and Medes, without mentioning their names; for that threatening is more emphatic, when he points them out, as it were, with the finger, as when we say, "This and that man." This contributes to the certainty of the prophecy, when he points out such distant events as if they were at hand. Shake the hand, that they may enter within the gates of the nobles. When he says, Shake the hand, and they shall enter, he means that the Persians and Medes shall no sooner begin to advance at the command of God than their road shall be plain and easy in spite of every obstruction. Though the Hebrews call Princes ndyvym, (Nedibim,) that is, generous and bountiful, on which is also founded that saying of Christ, euergetai kalountai, they are called benefactors, (Luke 22:25,) yet I think that the Prophet draws our attention to the splendor of power in which the Babylonians gloried. They were furnished above others with forces and warlike armaments, so that it appeared to be incredible that they could ever be vanquished. But the Prophet threatens that nothing shall hinder God from opening up a way and entrance to the enemies.

Lift ye up a banner - A military ensign or standard. The vision opens here; and the first thing which the prophet hears, is the solemn command of God addressed to the nations as subject to him, to rear the standard of war, and to gather around it the mighty armies which were to be employed in the destruction of the city. This command, 'Lift ye up a banner,' is addressed to the leaders of those armies to assemble them, and to prepare them for war.
Upon the high mountain - It was customary for military leaders to plant a standard on a tower, a fortress, a city, a high mountain, or any elevated spot, in order that it might be seen afar, and be the rallying point for the people to collect together (see the note at Isaiah 11:10). Here, the prophet does not refer to any particular "mountain," but means simply, that a standard should be raised, around which the hosts should be assembled to march to Babylon. The Chaldee renders it, 'Over the city dwelling in security, lift up the banner.'
Exalt the voice - Raise up the voice, commanding the people to assemble, and to prepare for the march against Babylon, Perhaps, however, the word 'voice' here (קול qôl) refers to the "clangor," or sound, of a trumpet used for mustering armies. The word is often used to denote "any" noise, and is frequently applied to thunder, to the trumpet, etc.
Unto them - That is, to the Medes and Persians, who were to be employed in the destruction of Babylon.
Shake the hand - In the way of beckoning; as when one is at so great a distance that the voice cannot be heard, the hand is waved for a sign. This was a command to beckon to the nations to assemble for the destruction of Babylon.
That they may go into the gates of the nobles - The word rendered here 'nobles' (נדיבים nedı̂ybı̂ym) means, properly, "voluntary, free, liberal;" then those who are noble, or liberally-minded, from the connection between nobleness and liberality; then those who are noble or elevated in rank or office. In this sense it is used here; compare Job 12:21; Job 34:18; 1-Samuel 2:8; Psalm 107:40; and Proverbs 8:16, where it is rendered 'princes;' Numbers 21:18, where it is rendered 'nobles.' Lowth renders it here 'princes.' Noyes renders it 'tyrants ' - a sense which the word has in Job 21:28 (see the note at that place). There is no doubt that it refers to Babylon; and the prophet designs probably to speak of Babylon as a magnificent city - a city of princes, or nobles. The Chaldee renders it, 'That they may enter its gates, which open to them of their own accord;' retaining the original signification of "voluntariness" in the Hebrew word, and expressing the idea that the conquest would be easy. Our common translation has expressed the correct sense.

Exalt the voice - The word להם lahem, "to them," which is of no use, and rather weakens the sentence, is omitted by an ancient MS., and the Vulgate.

Lift ye up a banner upon the high mountain, exalt the voice to them, shake the (b) hand, that they may go into the gates of the nobles.
(b) That is, the Medes and Persians.

Lift ye up a banner upon the high mountain,.... Or "upon the mountain Nishphah"; some high mountain in Media or Persia, proper to set a standard on, or erect a banner for the gathering men together, to enlist themselves as soldiers, and so form an army to march into the land of Chaldea. Vitringa thinks there may be an allusion to the mountain Zagrius, which divides Media and Persia from Assyria, mentioned by Strabo (x). Or "upon a high mountain"; any high mountain fit for such a purpose; or "against the high mountain", as some (y) read it; meaning Babylon, called a mountain, Jeremiah 51:25 not because of its situation, for it was in a plain; but because of its eminence above other cities and states. The Targum is,
"against the city that dwells securely, lift up a sign;''
a token of war, proclaim war against it, that lives at ease, and is in peace; and so the word is used in the Talmudic language, as Kimchi observes; and to this agrees Jarchi's note,
"to gather against the mountain that is quiet, and trusts in its tranquillity, lift up a banner to the nations.''
Exalt the voice unto them; the Medes, mentioned by name in Isaiah 13:17 such as were within call, or were gathered together by the lifting up of the banner; such were to be urged with great vehemency to enlist themselves, and engage in a war against Babylon:
shake the hand; beckon with it to them that are afar off, that cannot hear the voice:
that they may go into the gates of the nobles; that dwell in the city of Babylon, where they might expect to find rich plunder; though some understand this of the nobles or princes of the Medes and Persians, as Kimchi observes, that should enter through the gates of Babylon into the city; and by others it is interpreted of the soldiers coming to the doors of the leaders or generals of the army, to give in their names, and enlist themselves in their service; which well agrees with what goes before.
(x) Geograph. l. 11. p. 359. (y) "contra montem excelsum", Forerius, Sanctius.

Lift . . . banner-- (Isaiah 5:26; Isaiah 11:10).
the high mountain--rather, "a bare (literally, "bald," that is, without trees) mountain"; from it the banner could be seen afar off, so as to rally together the peoples against Babylon.
unto them--unto the Medes (Isaiah 13:17), the assailants of Babylon. It is remarkable that Isaiah does not foretell here the Jews' captivity in Babylon, but presupposes that event, and throws himself beyond, predicting another event still more future, the overthrow of the city of Israel's oppressors. It was now one hundred seventy-four years before the event.
shake . . . hand--beckon with the hand--wave the hand to direct the nations to march against Babylon.
nobles--Babylonian. Rather, in a bad sense, tyrants; as in Isaiah 14:5, "rulers" in parallelism to "the wicked"; and Job 21:28 [MAURER].

The prophet hears a call to war. From whom it issues, and to whom or against whom it is directed, still remains a secret; but this only adds to the intensity."On woodless mountain lift ye up a banner, call to them with loud sounding voice, shake the hand, that they may enter into gates of princes!" The summons is urgent: hence a threefold signal, viz., the banner-staff planted on a mountain "made bald" (nishpeh, from which comes shephi, which only occurs in Isaiah and Jeremiah), the voice raised high, and the shaking of the hand, denoting a violent beckoning - all three being favourite signs with Isaiah. The destination of this army is to enter into a city of princes (nedı̄bı̄m, freemen, nobles, princes, Psalm 107:40, cf., Psalm 113:8), namely, to enter as conquerors; for it is not the princes who invite them, but Jehovah.

A banner - To gather soldiers together. Mountain - Whence it may be discerned at a considerable distance. Withal he seems to intimate, that their enemies should come from the mountainous country of Media. Them - To the Medes. Shake - Beckon to them with your hand, that they may come to this service, that they may go and fight against Babylon, and take it, and so enter in to the palaces of the king, and his princes.