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

[494] Now when he perceived that those who were for innovations would not be pacified till some great calamity should overtake them, he sent out upon them those two Roman legions that were in the city, and together with them five thousand other soldiers, who, by chance, were come together out of Libya, to the ruin of the Jews. They were also permitted not only to kill them, but to plunder them of what they had, and to set fire to their houses. These soldiers rushed violently into that part of the city that was called Delta, where the Jewish people lived together, and did as they were bidden, though not without bloodshed on their own side also; for the Jews got together, and set those that were the best armed among them in the forefront, and made a resistance for a great while; but when once they gave back, they were destroyed unmercifully; and this their destruction was complete, some being caught in the open field, and others forced into their houses, which houses were first plundered of what was in them, and then set on fire by the Romans; wherein no mercy was shown to the infants, and no regard had to the aged; but they went on in the slaughter of persons of every age, till all the place was overflowed with blood, and fifty thousand of them lay dead upon heaps; nor had the remainder been preserved, had they not be-taken themselves to supplication. So Alexander commiserated their condition, and gave orders to the Romans to retire; accordingly, these being accustomed to obey orders, left off killing at the first intimation; but the populace of Alexandria bare so very great hatred to the Jews, that it was difficult to recall them, and it was a hard thing to make them leave their dead bodies.