that the waters which came down from above stood, and rose up in one heap, a great way off, at Adam, the city that is beside Zarethan; and those that went down toward the sea of the Arabah, even the Salt Sea, were wholly cut off: and the people passed over right against Jericho.
Two million Israelites could have crossed the river in half a day if the procession was a mile or more wide. The dry ground (Joshua 3:17) was a miracle too (cf. Exodus 14:21).