Early in the morning Joshua rose and set out from Shittim, with all the people of Israel; and they came to the Jordan, and lodged there before they passed over. At the end of three days the officers went through the camp and commanded the people, “When you see the ark of the covenant of the Lord your God being carried by the Levitical priests, then you shall set out from your place and follow it, that you may know the way you shall go, for you have not passed this way before. Yet there shall be a space between you and it, a distance of about two thousand cubits; do not come near it.” And Joshua said to the people, “Sanctify yourselves; for tomorrow the Lord will do wonders among you.” And Joshua said to the priests, “Take up the ark of the covenant, and pass on before the people.” And they took up the ark of the covenant, and went before the people.
And the Lord said to Joshua, “This day I will begin to exalt you in the sight of all Israel, that they may know that, as I was with Moses, so I will be with you. And you shall command the priests who bear the ark of the covenant, ‘When you come to the brink of the waters of the Jordan, you shall stand still in the Jordan.’” And Joshua said to the people of Israel, “Come hither, and hear the words of the Lord your God.” And Joshua said, “Hereby you shall know that the living God is among you, and that he will without fail drive out from before you the Canaanites, the Hittites, the Hivites, the Per′izzites, the Gir′gashites, the Amorites, and the Jeb′usites. Behold, the ark of the covenant of the Lord of all the earth is to pass over before you into the Jordan. Now therefore take twelve men from the tribes of Israel, from each tribe a man. And when the soles of the feet of the priests who bear the ark of the Lord, the Lord of all the earth, shall rest in the waters of the Jordan, the waters of the Jordan shall be stopped from flowing, and the waters coming down from above shall stand in one heap.”
–Joshua 3:1-13