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

[517] But as for the Jews, when they saw the war approaching to their metropolis, they left the feast, and betook themselves to their arms; and taking courage greatly from their multitude, went in a sudden and disorderly manner to the fight, with a great noise, and without any consideration had of the rest of the seventh day, although the Sabbath ¹ was the day to which they had the greatest regard; but that rage which made them forget the religious observation [of the sabbath] made them too hard for their enemies in the fight: with such violence therefore did they fall upon the Romans, as to break into their ranks, and to march through the midst of them, making a great slaughter as they went, insomuch that unless the horsemen, and such part of the footmen as were not yet tired in the action, had wheeled round, and succored that part of the army which was not yet broken, Cestius, with his whole army, had been in danger: however, five hundred and fifteen of the Romans were slain, of which number four hundred were footmen, and the rest horsemen, while the Jews lost only twenty-two, of whom the most valiant were the kinsmen of Monobazus, king of Adiabene, and their names were Monobazus and Kenedeus; and next to them were Niger of Perea, and Silas of Babylon, who had deserted from king Agrippa to the Jews; for he had formerly served in his army. When the front of the Jewish army had been cut off, the Jews retired into the city; but still Simon, the son of Giora, fell upon the backs of the Romans, as they were ascending up Bethoron, and put the hindmost of the army into disorder, and carried off many of the beasts that carded the weapons of war, and led Shem into the city. But as Cestius tarried there three days, the Jews seized upon the elevated parts of the city, and set watches at the entrances into the city, and appeared openly resolved not to rest when once the Romans should begin to march.