Joshua 3:3, 6, 15-17

and gave orders to the people: “When you see the priests and Levites carrying the Ark of the Agreement with the LORD your God, leave where you are and follow it.

Joshua said to the priests, “Take the Ark of the Agreement and go ahead of the people.” So the priests lifted the Ark and carried it ahead of the people.

During harvest the Jordan overflows its banks. When the priests carrying the Ark came to the edge of the river and stepped into the water, the water upstream stopped flowing. It stood up in a heap a great distance away at Adam, a town near Zarethan. The water flowing down to the Sea of Arabah (the Dead Sea) was completely cut off. So the people crossed the river near Jericho. The priests carried the Ark of the Agreement with the LORD to the middle of the river and stood there on dry ground. They waited there while all the people of Israel walked across the Jordan River on dry land.