The Works of Flavius Josephus; comprising the Antiquities of the Jews; a History of the Jewish Wars, and Life of Flavius Josephus; Written by Himself. Translated by William Whiston, A.M., Professor of mathematics in the University of Cambridge (Willoughby & Co. London 1840)
Page 223. ‘…the ten tribes are beyond Euphrates till now, and are an immense multitude, and not to be estimated by numbers.’