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

[224] At the same time also did Antipas, another of Herod's sons, sail to Rome, in order to gain the government; being buoyed up by Salome with promises that he should take that government; and that he was a much honester and fitter man than Archelaus for that authority, since Herod had, in his former testament, deemed him the worthiest to be made king, which ought to be esteemed more valid than his latter testament. Antipas also brought with him his mother, and Ptolemy the brother of Nicolaus, one that had been Herod's most honored friend, and was now zealous for Antipas; but it was Ireneus the orator, and one who, on account of his reputation for sagacity, was intrusted with the affairs of the kingdom, who most of all encouraged him to attempt to gain the kingdom; by whose means it was, that when some advised him to yield to Archelaus, as to his elder brother, and who had been declared king by their father's last will, he would not submit so to do. And when he was come to Rome, all his relations revolted to him; not out of their good-will to him, but out of their hatred to Archelaus; though indeed they were most of all desirous of gaining their liberty, and to be put under a Roman governor; but if there were too great an opposition made to that, they thought Antipas preferable to Archelaus, and so joined with him, in order to procure the kingdom for him. Sabinus also, by letters, accused Archelaus to Caesar.