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

[337] But while there were daily skirmishes, the enemy waited for the coming of the multitude out of the country to Pentecost, a feast of ours so called; and when that day was come, many ten thousands of the people were gathered together about the temple, some in armor, and some without. Now those that came guarded both the temple and the city, excepting what belonged to the palace, which Herod guarded with a few of his soldiers; and Phasaelus had the charge of the wall, while Herod, with a body of his men, sallied out upon the enemy, who lay in the suburbs, and fought courageously, and put many ten thousands to flight, some flying into the city, and some into the temple, and some into the outer fortifications, for some such fortifications there were in that place. Phasaelus came also to his assistance; yet was Pacorus, the general of the Parthians, at the desire of Antigonus, admitted into the city, with a few of his horsemen, under pretence indeed as if he would still the sedition, but in reality to assist Antigonus in obtaining the government. And when Phasaelus met him, and received him kindly, Pacorus persuaded him to go himself as ambassador to Barzapharnes, which was done fraudulently. Accordingly, Phasaelus, suspecting no harm, complied with his proposal, while Herod did not give his consent to what was done, because of the perfidiousness of these barbarians, but desired Phasaelus rather to fight those that were come into the city.