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

[249] But Hyrcanus opened the sepulcher of David, who excelled all other kings in riches, and took out of it three thousand talents. He was also the first of the Jews that, relying on this wealth, maintained foreign troops. There was also a league of friendship and mutual assistance made between them; upon which Hyrcanus admitted him into the city, and furnished him with whatsoever his army wanted in great plenty, and with great generosity, and marched along with him when he made an expedition against the Parthians; of which Nicolaus of Damascus is a witness for us; who in his history writes thus: "When Antiochus had erected a trophy at the river Lycus, upon his conquest of Indates, the general of the Parthians, he staid there two days. It was at the desire of Lyrcanus the Jew, because it was such a festival derived to them from their forefathers, whereon the law of the Jews did not allow them to travel." And truly he did not speak falsely in saying so; for that festival, which we call Pentecost, did then fall out to be the next day to the Sabbath. Nor is it lawful for us to journey, either on the Sabbath day, or on a festival day ¹ But when Antiochus joined battle with Arsaces, the king of Parthin, he lost a great part of his army, and was himself slain; and his brother Demetrius succeeded in the kingdom of Syria, by the permission of Arsaces, who freed him from his captivity at the same time that Antiochus attacked Parthin, as we have formerly related elsewhere.