Josephus,
The Works of Flavius Josephus
(1879)
“ And this speech Artabanus made with tears in his eyes, and with a dejected countenance. Now as soon as Izates heard Artabanus's name, and saw him stand as a supplicant before him, he leaped down from his horse immediately, and said to him, "Take courage, O king! nor be disturbed at thy present calamity, as if it were incurable; for the change of thy sad condition shall be sudden; for thou shalt find me to be more thy friend and thy assistant than thy hopes can promise thee; for I will either re-establish thee in the kingdom of Parthia, or lose my own." ”
