Josephus: Wars of the Jews, Book 6, Chapter 5
2. The soldiers also came to the rest of the cloisters that were in the outer [court of the] temple, whither the women and children, and a great mixed multitude of the people, fled, in number about six thousand. But before Caesar had determined any thing about these people, or given the commanders any orders relating to them, the soldiers were in such a rage, that they set that cloister on fire; by which means it came to pass that some of these were destroyed by throwing themselves down headlong, and some were burnt in the cloisters themselves. Nor did any one of them escape with his life. A false prophet was the occasion of these people's destruction, who had made a public proclamation in the city that very day, that God commanded them to get upon the temple, and that there they should receive miraculous signs of their deliverance. Now there was then a great number of false prophets suborned by the tyrants to impose on the people, who denounced this to them, that they should wait for deliverance from God; and this was in order to keep them from deserting, and that they might be buoyed up above fear and care by such hopes. Now a man that is in adversity does easily comply with such promises; for when such a seducer makes him believe that he shall be delivered from those miseries which oppress him, then it is that the patient is full of hopes of such his deliverance.
3. Thus were the miserable people persuaded by these deceivers, and such as belied God himself; while they did not attend nor give credit to the signs that were so evident, and did so plainly foretell their future desolation, but, like men infatuated, without either eyes to see or minds to consider, did not regard the denunciations that God made to them.
When Petronius had said this, and had dismissed rite assembly of the Jews, he desired the principal of them to take care of their husbandry, and to speak kindly to the people, and encourage them to have good hope of their affairs. Thus did he readily bring the multitude to be cheerful again. And now did God show his presence to Petronius, and signify to him that he would afford him his assistance in his whole design; for he had no sooner finished the speech that he made to the Jews, but God sent down great showers of rain, contrary to human expectation; for that day was a clear day, and gave no sign, by the appearance of the sky, of any rain; nay, the whole year had been subject to a great drought, and made men despair of any water from above, even when at any time they saw the heavens overcast with clouds; insomuch that when such a great quantity of rain came, and that in an unusual manner, and without any other expectation of it, the Jews hoped that Petronius would by no means fail in his petition for them. But as to Petronius, he was mightily surprised when he perceived that God evidently took care of the Jews, and gave very plain signs of his appearance, and this to such a degree, that those that were in earnest much inclined to the contrary had no power left to contradict it. This was also among those other particulars which he wrote to Caius, which all tended to dissuade him, and by all means to entreat him not to make so many ten thousands of these men go distracted; whom, if he should slay, (for without war they would by no means suffer the laws of their worship to be set aside,) he would lose the revenue they paid him, and would be publicly cursed by them for all future ages. Moreover, that God, who was their Governor, had shown his power most evidently on their account, and that such a power of his as left no room for doubt about it. And this was the business that Petronius was now engaged in.