Eusebius Church History Book 3.7. 1. Concerning the Destruction of Jerusalem in 70 AD.
It is fitting to add to these accounts the true prediction of our Savior in which he foretold these very events.
2. His words are as follows: Woe unto them that are with child, and to them that give suck in those days! But pray that your flight be not in the winter, neither on the Sabbath day. For there shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
3. The historian, reckoning the whole number of the slain, says that eleven hundred thousand persons perished by famine and sword, and that the rest of the rioters and robbers, being betrayed by each other after the taking of the city, were slain. But the tallest of the youths and those that were distinguished for beauty were preserved for the triumph. Of the rest of the multitude, those that were over seventeen years of age were sent as prisoners to labor in the works of Egypt, while still more were scattered through the provinces to meet their death in the theaters by the sword and by beasts. Those under seventeen years of age were carried away to be sold as slaves, and of these alone the number reached ninety thousand.
- These things took place in this manner in the second year of the reign of Vespasian, in accordance with the prophecies of our Lord and
Savior Jesus Christ, who by divine power saw them beforehand as if they were already present, and wept and mourned according to the statement of the holy evangelists, who give the very words which he uttered, when, as if addressing Jerusalem herself, he said:
5. If you had known, even you, in this day, the things which belong unto your peace! But now they are hid from your eyes. For the days shall come upon you, that your enemies shall cast a rampart about you, and compass you round, and keep you in on every side, and shall lay you and your children even with the ground.
6. And then, as if speaking concerning the people, he says, For there shall be great distress in the land, and wrath upon this people. And they shall fall by the edge of the sword, and shall be led away captive into all nations. And Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled. And again: When you shall see Jerusalem compassed with armies, then know that the desolation thereof is near.
7. If any one compares the words of our Savior with the other accounts of the historian concerning the whole war, how can one fail to wonder, and to admit that the foreknowledge and the prophecy of our
Savior were truly divine and marvelously strange.
8. Concerning those calamities, then, that befell the whole Jewish nation after the
Savior's passion and after the words which the multitude of the Jews uttered, when they begged the release of the robber and murderer, but besought that the Prince of Life should be taken from their midst, it is not necessary to add anything to the account of the historian.
9. But it may be proper to mention also those events which exhibited the graciousness of that all-good Providence which held back their destruction full forty years after their crime against Christ—during which time many of the apostles and disciples, and James himself the first bishop there, the one who is called the brother of the Lord, were still alive, and dwelling in Jerusalem itself, remained the surest bulwark of the place. Divine Providence thus still proved itself long-suffering toward them in order to see whether by repentance for what they had done they might obtain pardon and salvation; and in addition to such long-suffering, Providence also furnished wonderful signs of the things which were about to happen to them if they did not repent.
10. Since these matters have been thought worthy of mention by the historian already cited, we cannot do better than to recount them for the benefit of the readers of this work.
The quote above demonstrates the belief that many of the ECF accepted that Jerusalem was destroyed in 70 AD according to The Olivet Discourse. (Mathew 24 Mark 13 and Luke 21) BUT they also all believed in a future coming. Not one believed the Olivet contained a promise of the "second coming".
Therefore the accepted idea of Dispensationalist and Preterists alike that believe a promise of a second coming is mentioned in Mathew 24:30 is not what the early church fathers believed. Further they claim of Jesus was that this was all to happen in "this generation".
This point is addressed