Joshua 3:2-5 (NIV)
2 After three days the officers went throughout the camp, 3 giving orders to the people: “When you see the ark of the covenant of the Lord your God, and the Levitical priests carrying it, you are to move out from your positions and follow it. 4 Then you will know which way to go, since you have never been this way before. But keep a distance of about two thousand cubits[a] between you and the ark; do not go near it.”
5 Joshua told the people, “Consecrate yourselves, for tomorrow the Lordwill do amazing things among you.”
Joshua 3:13-17 (NIV)
13 And as soon as the priests who carry the ark of the Lord—the Lord of all the earth—set foot in the Jordan, its waters flowing downstream will be cut off and stand up in a heap.”
14 So when the people broke camp to cross the Jordan, the priests carrying the ark of the covenant went ahead of them. 15 Now the Jordan is at flood stage all during harvest. Yet as soon as the priests who carried the ark reached the Jordan and their feet touched the water’s edge, 16 the water from upstream stopped flowing. It piled up in a heap a great distance away, at a town called Adam in the vicinity of Zarethan, while the water flowing down to the Sea of the Arabah (that is, the Dead Sea) was completely cut off. So the people crossed over opposite Jericho. 17 The priests who carried the ark of the covenant of the Lord stopped in the middle of the Jordan and stood on dry ground, while all Israel passed by until the whole nation had completed the crossing on dry ground.