Ezekiel 40:1

(Chapter XL - Verses 1 onwards) 'In the twenty-fifth year of our exile (or captivity), at the beginning of the year (or in the first month), on the tenth day of the month, fourteen years after the city was struck down (or captured): on that very day, the hand of the Lord was upon me, and He brought me there. In visions (or in a vision) of God, He brought me to the land of Israel, and set me down on a very high mountain, on which was like a city-building, facing southward (or from the south).' And he brought me there: and behold a man, whose appearance was like the appearance of brass (or shining brass); and a line of flax (or masons' line) was in his hand, and a measuring reed in his hand. And he stood in the gate: and he said to me, Son of man, see with your eyes, and hear with your ears, and set your heart upon all that I shall show you (or set in your heart all that I shall show you): for you have been brought (or entered) here for this purpose, and declare (or show) to the house of Israel all that you see. If, in the fifth year of captivity or exile of King Joachin, in the fourth month, in the fifth day of the month, the heavens were opened to the prophet Ezekiel by the river Chebar, and he saw visions of God; and now it is said that in the twenty-fifth year of the same captivity or exile of Jehoiachin, at the beginning of the year, in the tenth month, the hand of the Lord came upon him, and he was brought to the land of Israel and placed on a very high mountain, where he could see the city under construction, facing south; then there is no doubt that his entire prophecy was composed over a period of nineteen years, nine months, and five days of the twentieth year. […]

Your prayers, daughter Eustochium, and the Lord's promises have overcome my fear of explaining the temple of Ezekiel, or rather my determination to remain silent, as it says: Ask, and it will be given to you; seek, and you will find; knock, and it will be opened to you.

About to speak of mystical things, he sets forth the historical narrative first, so that he may establish from the time what is to be believed from the revelation. It should be noted that at the beginning of this book he indicated in what year he began to prophesy; but at the end he inserted when he saw the final vision, so that it might be known over how many years he composed the book of his prophecy. For the time when he began to prophesy, he placed at the beginning of his speech, saying: The heavens were opened, and I saw visions of the Lord on the fifth of the month; this is the fifth year of the captivity of King Jehoiachin. But now he speaks, saying: In the twenty-fifth year of our captivity. For the same prophet had been carried off to Babylon in the first captivity with King Jehoiachin. For concerning the second captivity of Jerusalem he adds: In the fourteenth year after the city was struck. For Zedekiah had reigned in the city of Jerusalem for eleven years after the first captivity, in which the prophet Ezekiel was led to Babylon with King Jehoiachin. But in the fourteenth year after the captivity of that same Zedekiah, which was now the second captivity of the city, the prophet was seeing the final vision. Thus eleven and fourteen joined together make twenty-five. If therefore he spoke the first vision in the fifth year of the earlier captivity, and he describes this final one as having occurred in the twenty-fifth year, it is clearly evident that in twenty years he extended the delays of his speech up to the words of his final vision. Nor should it disturb anyone that in the middle of the volume of his prophecy, when he was speaking about the Babylonian king, he makes mention of the twenty-seventh year. […]

It should be noted what he says: "In the fourteenth year after the city was struck, on that same day." For what does it mean that through this final vision almighty God deigned to show the mercy of His promise on that very day on which He fulfilled the wrath of justice upon the stricken city, except that that power of divinity, which is not drawn into any movement of change or mutability, by that same light of justice gives life to the afflicted and penitent by which it strikes down the proud and obstinate?

Of our captivity - Of those that were carried away into captivity with Jeconiah eleven years before Jerusalem was burnt. And this falls in with the three thousand three hundred and seventy fourth year of the world, about five hundred and seventy four years before Christ's incarnation.