Joshua 4:8-13

8So the Israelites did as Joshua commanded them. They took twelve stones from the middle of the Jordan, according to the number of the tribes of the Israelites, as the LORD had told Joshua; and they carried them over with them to their camp, where they put them down.

9Joshua set up the twelve stones that had been Or Joshua also set up twelve stones in the middle of the Jordan at the spot where the priests who carried the ark of the covenant had stood. And they are there to this day. 10Now the priests who carried the ark remained standing in the middle of the Jordan until everything the LORD had commanded Joshua was done by the people, just as Moses had directed Joshua. The people hurried over, 11and as soon as all of them had crossed, the ark of the LORD and the priests came to the other side while the people watched. 12The men of Reuben, Gad and the half-tribe of Manasseh crossed over, ready for battle, in front of the Israelites, as Moses had directed them.

13About forty thousand armed for battle crossed over before the LORD to the plains of Jericho for war.