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

[355] But for Herod himself, he raised his mind above the miserable state he was in, and was of good courage in the midst of his misfortunes; and as he passed along, he bid them every one to be of good cheer, and not to give themselves up to sorrow, because that would hinder them in their flight, which was now the only hope of safety that they had. Accordingly, they tried to bear with patience the calamity they were under, as he exhorted them to do; yet was he once almost going to kill himself, upon the overthrow of a waggon, and the danger his mother was then in of being killed; and this on two accounts, because of his great concern for her, and because he was afraid lest, by this delay, the enemy should overtake him in the pursuit: but as he was drawing his sword, and going to kill himself therewith, those that were present restrained him, and being so many in number, were too hard for him; and told him that he ought not to desert them, and leave them a prey to their enemies, for that it was not the part of a brave man to free himself from the distresses he was in, and to overlook his friends that were in the same distresses also. So he was compelled to let that horrid attempt alone, partly out of shame at what they said to him, and partly out of regard to the great number of those that would not permit him to do what he intended. So he encouraged his mother, and took all the care of her the time would allow, and proceeded on the way he proposed to go with the utmost haste, and that was to the fortress of Masada. And as he had many skirmishes with such of the Parthians as attacked him and pursued him, he was conqueror in them all.