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

[483] When they had thus soon pacified him, as being their father, they got clear of the present fear they were in. Yet did they see occasion for sorrow in some time afterward; for they knew that Salome, as well as their uncle Pheroras, were their enemies; who were both of them heavy and severe persons, and especially Pheroras, who was a partner with Herod in all the affairs of the kingdom, excepting his diadem. He had also a hundred talents of his own revenue, and enjoyed the advantage of all the land beyond Jordan, which he had received as a gift from his brother, who had asked of Caesar to make him a tetrarch, as he was made accordingly. Herod had also given him a wife out of the royal family, who was no other than his own wife's sister, and after her death had solemnly espoused to him his own eldest daughter, with a dowry of three hundred talents; but Pheroras refused to consummate this royal marriage, out of his affection to a maidservant of his. Upon which account Herod was very angry, and gave that daughter in marriage to a brother's son of his, [Joseph,] who was slain afterward by the Parthians; but in some time he laid aside his anger against Pheroras, and pardoned him, as one not able to overcome his foolish passion for the maid-servant.