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

[353] So Anileus took the government upon himself alone, and led his army against the villages of Mithridates, who was a man of principal authority in Parthin, and had married king Artabanus's daughter; he also plundered them, and among that prey was found much money, and many slaves, as also a great number of sheep, and many other things, which, when gained, make men's condition happy. Now when Mithridates, who was there at this time, heard that his villages were taken, he was very much displeased to find that Anileus had first begun to injure him, and to affront him in his present dignity, when he had not offered any injury to him beforehand; and he got together the greatest body of horsemen he was able, and those out of that number which were of an age fit for war, and came to fight Anileus; and when he was arrived at a certain village of his own, he lay still there, as intending to fight him on the day following, because it was the sabbath, the day on which the Jews rest. And when Anileus was informed of this by a Syrian stranger of another village, who not only gave him an exact account of other circumstances, but told him where Mithridates would have a feast, he took his supper at a proper time, and marched by night, with an intent of falling upon the Parthians while they were unaprrized what they should do; so he fell upon them about the fourth watch of the night, and some of them he slew while they were asleep, and others he put to flight, and took Mithridates alive, and set him naked upon an ass which, among the Parthians, is esteemed the greatest reproach possible. And when he had brought him into a wood with such a resolution, and his friends desired him to kill Mithridates, he soon told them his own mind to the contrary, and said that it was not right to kill a man who was of one of the principal families among the Parthians, and greatly honored with matching into the royal family; that so far as they had hitherto gone was tolerable; for although they had injured Mithridates, yet if they preserved his life, this benefit would be remembered by him to the advantage of those that gave it him; but that if be were once put to death, the king would not be at rest till he had made a great slaughter of the Jews that dwelt at Babylon; "to whose safety we ought to have a regard, both on account of our relation to them, and because if any misfortune befall us, we have no other place to retire to, since he hath gotten the flower of their youth under him." By this thought, and this speech of his made in council, he persuaded them to act accordingly; so Mithridates was let go. But when he was got away, his wife reproached him, that although he was son-in-law to the king, he neglected to avenge himself on those that had injured him, while he took no care about it, but was contented to have been made a captive by the Jews, and to have escaped them; and she bid him either to go back like a man of courage, or else she sware by the gods of their royal family that she would certainly dissolve her marriage with him. Upon which, partly because he could not bear the daily trouble of her taunts, and partly because he was afraid of her insolence, lest she should in earnest dissolve their marriage, he unwillingly, and against his inclinations, got together again as great an army as he could, and marched along with them, as himself thinking it a thing not to be borne any longer, that he, a Parthian, should owe his preservation to the Jews, when they had been too hard for him in the war.