Thus saith the Lord GOD; Art thou he of whom I have spoken in old time by my servants the prophets of Israel, which prophesied in those days many years that I would bring thee against them?

Thus saith the Lord God: Thou then art he, of whom I have spoken in the days of old, by my servants the prophets of Israel, who prophesied in the days of those times that I would bring thee upon them.

Thus said the Lord Jehovah: Art thou he of whom I spake in former days, By the hand of My servants, prophets of Israel, Who are prophesying in those days, years, To bring thee in against them?

This is what the Lord has said: You are he of whom I gave them word in earlier times by my servants, the prophets of Israel, who in those days went on saying, year after year, that I would make you come up against them.

Thus says the Lord God: Therefore, you are the one, about whom I spoke in the days of antiquity, by the hand of my servants the prophets of Israel, who prophesied in the days of those times that I would lead you over them.

Gog - is not mentioned by name in any existing prophecy before Ezekiel's time. The reference here shows
(1) that the conflict with Gog does not represent a particular event, but one of which the prophets in general had to speak;
(2) that in the interpretation of Old Testament prophecy we are to look beyond special fulfillments.
Events in the world's history come within a prophet's ken as parts of the divine administration whereby evil struggles against but is overcome by good. As every such conflict is a prelude to the final struggle, so its prediction has reference ultimately to the consummation here foretold.

Art thou he of whom I have spoken in old time - This prophecy concerning Antiochus and the Jews was delivered about four hundred years before the events took place. - Martin. Calmet maintains that Cambyses is spoken of, and refers to ancient prophecies, especially Isaiah 14, Isaiah 15:1-9, Isaiah 16:1-14, Isaiah 20:1-6, 21.

Thus saith the Lord GOD; [Art] thou he of whom I have spoken of old (m) by my servants the prophets of Israel, who prophesied in those days [many] years that I would bring thee against them?
(m) By this he declares that no affliction can come to the Church of which they have not been advertised before to teach them to endure all things with more patience when they know that God has so ordained.

Thus saith the Lord God,.... Putting the question that follows:
art thou he of whom I have spoken of old time by my servants the prophets of Israel, which prophesied in those days many years that I will bring thee against them? certainly thou art he: but who were the prophets that prophesied of Gog before Ezekiel, since he is the first that makes mention of him? to this it may be replied, that though he is not mentioned by name, yet he might be prophesied of under other names, as by Isaiah under the name of Leviathan, Isaiah 27:1 and by Micah under the name of the Assyrian, Micah 5:5. The Jews (r) say that Eldad and Medad prophesied of him, which Jarchi, Kimchi, and Abendana remark; who all observe, agreeably to the Talmudists in the place referred to, that these two are the prophets meant; and therefore it is directed to be read not "shanim", years, but "shenaim", two; namely, those two prophets prophesied one prophecy at one time, or together; but this is not to be depended upon: it should be observed, that this must be considered as spoken at the time of the accomplishment of this prophecy, and so may have respect to the Prophet Ezekiel himself, or to Joel, Joel 3:1, and to Zechariah, Zac 14:1, and even to the book of the Revelation, Revelation 16:14.
(r) T. Bab. Sanhedrin, fol. 17. 1. & Gloss. in ib.

thou he of whom I have spoken in old time--Gog, &c. are here identified with the enemies spoken of in other prophecies (Numbers 24:17-24; Isaiah 27:1; compare Isaiah 26:20-21; Jeremiah 30:23-24; Joel 3:1; Micah 5:5-6; Isaiah 14:12-14; Isaiah 59:19). God is represented as addressing Gog at the time of his assault; therefore, the "old time" is the time long prior, when Ezekiel uttered these prophecies; so, he also, as well as Daniel (Daniel. 11:1-45) and Zechariah (Zechariah. 14:1-21) are included among "the prophets of Israel" here.
many years--ago.

Announcement of the Wrathful Judgment upon Gog, as a Proof of the Holiness of the Lord
Ezekiel 38:17. Thus saith the Lord Jehovah, Art thou he of whom I spoke in the former days through my servants the prophets of Israel, who prophesied for years in those days, that I would bring thee over them? Ezekiel 38:18. And it cometh to pass in that day, in the day when Gog cometh into the land of Israel, is the saying of the Lord Jehovah, that my wrath will ascend into my nose. Ezekiel 38:19. And in my jealousy, in the fire of my anger, have I spoken, Truly in that day will a great trembling come over the land of Israel; Ezekiel 38:20. The fishes of the sea, and the birds of heaven, and the beasts of the field, and every creeping thing that creepeth upon the ground, and all the men that are upon the ground, will tremble before me; and the mountains will be destroyed, and the rocky heights fall, and every wall will fall to the ground. Ezekiel 38:21. I will call the sword against him to all my holy mountains, is the saying of the Lord Jehovah: the sword of the one will be against the other. Ezekiel 38:22. And I will strive with him by pestilence and by blood, and overflowing rain-torrents and hailstones; fire and brimstone will I rain upon him and all his hosts, and upon the many peoples that are with him; Ezekiel 38:23. And will prove myself great and holy, and will make myself known before the eyes of many nations, that they may know that I am Jehovah. - The announcement of the way in which the Lord will sanctify Himself upon Gog (Ezekiel 38:16) commences with the statement in Ezekiel 38:17, that Gog is he of whom God has already spoken by the earlier prophets. This assertion is clothed in the form of a question: האתּה, not הלא אתּה, which is the interrogative form used for an emphatic assurance; whereas האתּה does not set down the point in question as indisputably certain, but suggests the inquiry for the purpose of giving a definite answer. The affirmative reply to the question asked is contained in the last clause of the verse: "to bring thee upon them;" so that האתּה הוּא really means, thou art truly he. The statement, that Gog is he of whom God had already spoken by the earlier prophets, does not mean that those prophets had actually mentioned Gog, but simply that Gog was the enemy of whose rising up against the people of God the prophets of the former time had prophesied, as well as of his destruction by a wrathful judgment of the Lord. שׁנים (for years, or years long) is an accusative of measure, not asyndeton to baבּיּמים, as the lxx and many of the commentators down to Hvernick have taken it to be. The design of this remark is not to accredit the prophecy by referring to the utterances of earlier prophets, but to show that the attack of the peoples gathered together by Gog, upon the land and people of the Lord, is not an unexpected event, or one at variance with the promise of the restoration of Israel as a kingdom of peace. To what utterances of the older prophets these words refer is a question difficult to answer. Zechariah (Zac 12:2-3; Zac 14:2-3) is of course not to be thought of, as Zechariah himself did not prophesy till after the captivity, and therefore not till after Ezekiel. But we may recall Joel 4:2 and 11ff.; Isaiah 25:5, Isaiah 25:10., Ezekiel 26:21; Jeremiah 30:23 and 25; and, in fact, all the earlier prophets who prophesied of Jehovah's day of judgment upon all the heathen.
(Note: Aug. Kueper (Jeremias librr. sacrr., interpr. atque vindex, p. 82) has correctly observed concerning this verse, that "it is evident enough that there is no reference here to prophecies concerning Gog and Magog, which have been lost; but those general prophecies, which are met with on every hand directed against the enemies of the church, are here referred to Gog." And before him, J. F. Starck had already said: "In my opinion, we are to understand all those passages in the prophets which treat of the enemies of the church and its persecutions...these afflictions were preludes and shadows of the bloody persecution of Gog.")
Ezekiel 38:18 and Ezekiel 38:19 do not contain words which Jehovah spoke through the ancient prophets, and which Ezekiel now transfers to Gog and the time of his appearing (Hitzig and Kliefoth). The perfect דּבּרתּי in Ezekiel 38:19 by no means warrants such an assumption; for this is purely prophetic, expressing the certainty of the divine determination as a thing clearly proved. Still less can 'נאם אד in Ezekiel 38:18 be taken as a preterite, as Kliefoth supposes; nor can Ezekiel 38:18 and Ezekiel 38:19 be regarded as a thing long predicted, and so be separated from Ezekiel 38:20-23 as a word of God which is now for the first time uttered. For the anthropopathetic expression, "my wrath ascends in my nose," compare Psalm 18:9, "smoke ascends in His nose." The outburst of wrath shows itself in the vehement breath which the wrathful man inhales and exhales through his nose (see the comm. on the Psalm, l.c.). The bursting out of the wrath of God is literally explained in Ezekiel 38:19. In the jealousy of His wrath God has spoken, i.e., determined, to inflict a great trembling upon the land of Israel. בּקנאתי (cf. Ezekiel 5:13) is strengthened by בּאשׁ עברתי (cf. Ezekiel 21:36; Ezekiel 22:21). The trembling which will come upon the land of Israel, so that all creatures in the sea, in the air, and upon the ground, tremble before Jehovah (מפּני), who appears to judgment, will rise in nature into an actual earthquake, which overthrows mountains, hills, and walls. מדרגות are steep heights, which can only be ascended by steps (Song 2:14). This picture of the trembling of the whole world, with all the creatures, before the Lord who is coming to judgment, both here and in Joel 4:16, Zac 14:4-5, rests upon the fact which actually occurred in connection with the revelation of God upon Sinai, when the whole mountain was made to quake (Exodus 19:16.). The inhabitants of the land of Israel tremble at the terrible phenomena attending the revelation of the wrath of God, although the wrathful judgment does not apply to them, but to their enemies, Gog and his hosts. The Lord calls the sword against Gog, that his hosts may wound and slay one another. This feature of the destruction of the enemy by wounds inflicted by itself, which we meet with again in Zac 14:13, has its typical exemplar in the defeat of the Midianites in the time of Gideon (Judges 7:22), and also in that of the enemy invading Judah in the reign of Jehoshaphat (2-Chronicles 20:23). In לכל־הרי the ל is not distributive, but indicates the direction: "to all my mountains." The overthrow of the enemy is intensified by marvellous plagues inflicted by God - pestilence and blood (cf. Ezekiel 28:23), torrents of rain and hailstones (cf. Ezekiel 13:11), and the raining of fire and brimstone upon Gog, as formerly upon Sodom and Gomorrah (Genesis 19:24). - Thus will Jehovah prove Himself to be the almighty God by judgment upon His enemies, and sanctify Himself before all the nations (Ezekiel 38:23, compare Ezekiel 38:16 and Ezekiel 36:23).

Spoken - All these enterprises I have spoken of, and will as well defeat as I did foretel them.