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

[502] When he had made this pompous declaration, he got Herod to remit of his anger, though he were in disorder, who thereupon gave him the books which Alexander had composed to be read by him; and as he came to every head, he considered of it, together with Herod. So Archclaus took hence the occasion for that stratagem which he made use of, and by degrees he laid the blame on those men whose names were in these books, and especially upon Pheroras; and when he saw that the king believed him [to he in earnest], he said, "We must consider whether the young man be not himself plotted against by such a number of wicked wretches, and not thou plotted against by the young man; for I cannot see any occasion for his falling into so horrid a crime, since he enjoys the advantages of royalty already, and has the expectation of being one of thy successors; I mean this, unless there were some persons that persuade him to it, and such persons as make an ill use of the facility they know there is to persuade young men; for by such persons, not only young men are sometimes imposed upon, but old men also, and by them sometimes are the most illustrious families and kingdoms overturned."