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

[395] ¹ And now perhaps it may not seem unreasonable to some, that such an inveterate hatred might increase so much [on both sides], as to proceed further, and overcome nature; but it may justly deserve consideration, whether it be to be laid to the charge of the young men, that they gave such an occasion to their father's anger, and led him to do what he did, and by going on long in the same way put things past remedy, and brought him to use them so unmercifully; or whether it be to be laid to the father's charge, that he was so hard-hearted, and so very tender in the desire of government, and of other things that would tend to his glory, that tae would take no one into a partnership with him, that so whatsoever he would have done himself might continue immovable; or, indeed, whether fortune have not greater power than all prudent reasonings; whence we are persuaded that human actions are thereby determined beforehand by an inevitable necessity, and we call her Fate, because there is nothing which is not done by her; wherefore I suppose it will be sufficient to compare this notion with that other, which attribute somewhat to ourselves, and renders men not unaccountable for the different conducts of their lives, which notion is no other than the philosophical determination of our ancient law. Accordingly, of the two other causes of this sad event, any body may lay the blame on the young men, who acted by youthful vanity, and pride of their royal birth, that they should bear to hear the calumnies that were raised against their father, while certainly they were not equitable judges of the actions of his life, but ill-natured in suspecting, and intemperate in speaking of it, and on both accounts easily caught by those that observed them, and revealed them to gain favor; yet cannot their father be thought worthy excuse, as to that horrid impiety which he was guilty of about them, while he ventured, without any certain evidence of their treacherous designs against him, and without any proofs that they had made preparations for such attempt, to kill his own sons, who were of very comely bodies, and the great darlings of other men, and no way deficient in their conduct, whether it were in hunting, or in warlike exercises, or in speaking upon occasional topics of discourse; for in all these they were skillful, and especially Alexander, who was the eldest; for certainly it had been sufficient, even though he had condemned them, to have kept them alive in bonds, or to let them live at a distance from his dominions in banishment, while he was surrounded by the Roman forces, which were a strong security to him, whose help would prevent his suffering any thing by a sudden onset, or by open force; but for him to kill them on the sudden, in order to gratify a passion that governed him, was a demonstration of insufferable impiety. He also was guilty of so great a crime in his older age; nor will the delays that he made, and the length of time in which the thing was done, plead at all for his excuse; for when a man is on a sudden amazed, and in commotion of mind, and then commits a wicked action, although this be a heavy crime, yet is it a thing that frequently happens; but to do it upon deliberation, and after frequent attempts, and as frequent puttings-off, to undertake it at last, and accomplish it, was the action of a murderous mind, and such as was not easily moved from that which is evil. And this temper he showed in what he did afterward, when he did not spare those that seemed to be the best beloved of his friends that were left, wherein, though the justice of the punishment caused those that perished to be the less pitied, yet was the barbarity of the man here equal, in that he did not abstain from their slaughter also. But of those persons we shall have occasion to discourse more hereafter.