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

[90] But now was Joshua hindered by his age from executing what he intended to do (as did those that succeeded him in the government, take little care of what was for the advantage of the public); so he gave it in charge to every tribe to leave no remainder of the race of the Canaanites in the land that had been divided to them by lot; that Moses had assured them beforehand, and they might rest fully satisfied about it, that their own security and their observation of their own laws depended wholly upon it. Moreover, he enjoined them to give thirty-eight cities to the Levites, for they had already received ten in the country of the Amorites; and three of these he assigned to those that fled from the man-slayers, who were to inhabit there; for he was very solicitous that nothing should be neglected which Moses had ordained. These cities were, of the tribe of Judah, Hebron; of that of Ephraim, Shechem; and of that of Naphthali, Cadesh, which is a place of the Upper Galilee. He also distributed among them the rest of the prey not yet distributed, which was very great; whereby they had an affluence of great riches, both all in general, and every one in particular; and this of gold and of vestments, and of other furniture, besides a multitude of cattle, whose number could not be told.