Flavius Josephus, The Wars of the Jews
William Whiston, A.M., Ed.

[503] And now there arose another war at Jerusalem. There was a son of Giora, one Simon, by birth of Gerasa, a young man, not so cunning indeed as John [of Gisehala], who had already seized upon the city, but superior in strength of body and courage; on which account, when he had been driven away from that Acrabattene toparchy, which he once had, by Ananus the high priest, he came to those robbers who had seized upon Masada. At the first they suspected him, and only permitted him to come with the women he brought with him into the lower part of the fortress, while they dwelt in the upper part of it themselves. However, his manner so well agreed with theirs, and he seemed so trusty a man, that he went out with them, and ravaged and destroyed the country with them about Masada; yet when he persuaded them to undertake greater things, he could not prevail with them so to do; for as they were accustomed to dwell in that citadel, they were afraid of going far from that which was their hiding-place; but he affecting to tyrannize, and being fond of greatness, when he had heard of the death of Ananus, he left them, and went into the mountainous part of the country. So he proclaimed liberty to those in slavery, and a reward to those already free, and got together a set of wicked men from all quarters.