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

[160] There was now one Joseph, young in age, but of great reputation among the people of Jerusalem, for gravity, prudence, and justice. His father's name was Tobias; and his mother was the sister of Onias the high priest, who informed him of the coming of the ambassador; for he was then sojourning at a village named Phicol, ¹ where he was born. Hereupon he came to the city [Jerusalem], and reproved Onias for not taking care of the preservation of his countrymen, but bringing the nation into dangers, by not paying this money. For which preservation of them, he told him he had received the authority over them, and had been made high priest; but that, in case he was so great a lover of money, as to endure to see his country in danger on that account, and his countrymen suffer the greatest damages, he advised him to go to the king, and petition him to remit either the whole or a part of the sum demanded. Onias's answer was this: That he did not care for his authority, and that he was ready, if the thing were practicable, to lay down his high priesthood; and that he would not go to the king, because he troubled not himself at all about such matters. Joseph then asked him if he would not give him leave to go ambassador on behalf of the nation. He replied, that he would give him leave. Upon which Joseph went up into the temple, and called the multitude together to a congregation, and exhorted them not to be disturbed nor aftrighted, because of his uncle Onias's carelessness, but desired them to be at rest, and not terrify themselves with fear about it; for he promised them that he would be their ambassador to the king, and persuade him that they had done him no wrong. And when the multitude heard this, they returned thanks to Joseph. So he went down from the temple, and treated Ptolemy's ambassador in a hospitable manner. He also presented him with rich gifts, and feasted him magnificently for many days, and then sent him to the king before him, and told him that he would soon follow him; for he was now more willing to go to the king, by the encouragement of the ambassador, who earnestly persuaded him to come into Egypt, and promised him that he would take care that he should obtain every thing that he desired of Ptolemy; for he was highly pleased with his frank and liberal temper, and with the gravity of his deportment.