Luke 21:25-27
“There will be signs in the sun, moon and stars. On the earth, nations will be in anguish and perplexity at the roaring and tossing of the sea. 26 People will faint from terror, apprehensive of what is coming on the world, for the heavenly bodies will be shaken. 27 At that time they will see the Son of Man coming in a cloud with power and great glory.
Matthew 24:30
Then the sign of the Son of Man will appear in heaven, and then all the tribes of the earth will mourn, and they will see the Son of Man coming on the clouds of heaven with power and great glory.
Josephus the historian writes of supernatural signs that took place, just before the destruction of Jerusalem, including a sword above Jerusalem for a year, which was the sign of the son of man appearing in heaven.
The Sword Above Jerusalem
Thus it was that the wretched people were deluded at that time by charlatans and pretended messengers of the deity; while they neither heeded nor believed in the manifest portents that foretold the coming desolation, but, as if thunderstruck and bereft of eyes and mind, disregarded the plain warnings of God. So it was when a star, resembling a sword, stood over the city, and a comet which continued for a year." (Wars 6.5.3)
Bright Light Around Altar
Thus also before the Jews' rebellion, and before those commotions which preceded the war, when the people were come in great crowds to the feast of unleavened bread, on the eighth day of the month Xanthicus, 21 [Nisan,] and at the ninth hour of the night, so great a light shone round the altar and the holy house, that it appeared to be bright day time; which lasted for half an hour. This light seemed to be a good sign to the unskillful, but was so interpreted by the sacred scribes, as to portend those events that followed immediately upon it. (Wars 6.5.3)
Heifer Gives Birth
At the same festival also, a heifer, as she was led by the high priest to be sacrificed, brought forth a lamb in the midst of the temple. (Wars 6.5.3)
The Gate Opened
Moreover, the eastern gate of the inner 22 [court of the] temple, which was of brass, and vastly heavy, and had been with difficulty shut by twenty men, and rested upon a basis armed with iron, and had bolts fastened very deep into the firm floor, which was there made of one entire stone, was seen to be opened of its own accord about the sixth hour of the night. Now those that kept watch in the temple came hereupon running to the captain of the temple, and told him of it; who then came up thither, and not without great difficulty was able to shut the gate again. This also appeared to the vulgar to be a very happy prodigy, as if God did thereby open them the gate of happiness. But the men of learning understood it, that the security of their holy house was dissolved of its own accord, and that the gate was opened for the advantage of their enemies. So these publicly declared that the signal foreshowed the desolation that was coming upon them. (Wars 6.5.3)
Chariots in the Sky
Besides these, a few days after that feast, on the one and twentieth day of the month Artemisius, [Jyar,] a certain prodigious and incredible phenomenon appeared: I suppose the account of it would seem to be a fable, were it not related by those that saw it, and were not the events that followed it of so considerable a nature as to deserve such signals; for, before sun-setting, chariots and troops of soldiers in their armor were seen running about among the clouds, and surrounding of cities. (Wars 6.5.3)
Ghostly Voice
Moreover, at that feast which we call Pentecost, as the priests were going by night into the inner [court of the temple,] as their custom was, to perform their sacred ministrations, they said that, in the first place, they felt a quaking, and heard a great noise, and after that they heard a sound as of a great multitude, saying, "Let us remove hence." (Wars 6.5.3)
Woe, Woe to Jerusalem
But, what is still more terrible, there was one Jesus, the son of Ananus, a plebeian and a husbandman, who, four years before the war began, and at a time when the city was in very great peace and prosperity, came to that feast whereon it is our custom for every one to make tabernacles to God in the temple, 23 began on a sudden to cry aloud, "A voice from the east, a voice from the west, a voice from the four winds, a voice against Jerusalem and the holy house, a voice against the bridegrooms and the brides, and a voice against this whole people!" This was his cry, as he went about by day and by night, in all the lanes of the city. However, certain of the most eminent among the populace had great indignation at this dire cry of his, and took up the man, and gave him a great number of severe stripes; yet did not he either say any thing for himself, or any thing peculiar to those that chastised him, but still went on with the same words which he cried before. Hereupon our rulers, supposing, as the case proved to be, that this was a sort of divine fury in the man, brought him to the Roman procurator, where he was whipped till his bones were laid bare; yet he did not make any supplication for himself, nor shed any tears, but turning his voice to the most lamentable tone possible, at every stroke of the whip his answer was, "Woe, woe to Jerusalem!" And when Albinus [for he was then our procurator] asked him, Who he was? and whence he came? and why he uttered such words? he made no manner of reply to what he said, but still did not leave off his melancholy ditty, till Albinus took him to be a madman, and dismissed him. Now, during all the time that passed before the war began, this man did not go near any of the citizens, nor was seen by them while he said so; but he every day uttered these lamentable words, as if it were his premeditated vow, "Woe, woe to Jerusalem!" Nor did he give ill words to any of those that beat him every day, nor good words to those that gave him food; but this was his reply to all men, and indeed no other than a melancholy presage of what was to come. This cry of his was the loudest at the festivals; and he continued this ditty for seven years and five months, without growing hoarse, or being tired therewith, until the very time that he saw his presage in earnest fulfilled in our siege, when it ceased; for as he was going round upon the wall, he cried out with his utmost force, "Woe, woe to the city again, and to the people, and to the holy house!" And just as he added at the last, "Woe, woe to myself also!" there came a stone out of one of the engines, and smote him, and killed him immediately; and as he was uttering the very same presages he gave up the ghost. (Wars 6.5.3)