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

[16] Now while Joshua, the commander, was in fear about their passing over Jordan, for the river ran with a strong current, and could not be passed over with bridges, for there never had been bridges laid over it hitherto; and while he suspected, that if he should attempt to make a bridge, that their enemies would not afford him thee to perfect it, and for ferry-boats they had none, - God promised so to dispose of the river, that they might pass over it, and that by taking away the main part of its waters. So Joshua, after two days, caused the army and the whole multitude to pass over in the manner following: - The priests went first of all, having the ark with them; then went the Levites bearing the tabernacle and the vessels which belonged to the sacrifices; after which the entire multitude followed, according to their tribes, having their children and their wives in the midst of them, as being afraid for them, lest they should be borne away by the stream. But as soon as the priests had entered the river first, it appeared fordable, the depth of the water being restrained and the sand appearing at the bottom, because the current was neither so strong nor so swift as to carry it away by its force; so they all passed over the river without fear, finding it to be in the very same state as God had foretold he would put it in; but the priests stood still in the midst of the river till the multitude should be passed over, and should get to the shore in safety; and when all were gone over, the priests came out also, and permitted the current to run freely as it used to do before. Accordingly the river, as soon as the Hebrews were come out of it, arose again presently, and carne to its own proper magnitude as before.