Josue 3:1-6

And Josue rose before daylight, and removed the camp: and they departed from Setim, and came to the Jordan: he, and all the children of Israel; and they abode there for three days. After which, the heralds went through the midst of the camp, And began to proclaim: When you shall see the ark of the covenant of the Lord your God, and the priests of the race of Levi carrying it, rise you up also, and follow them as they go before. And let there be between you and the ark the space of two thousand cubits: that you may see it afar off, and know which way you must go: for you have not gone this way before. And take care you come not near the ark. And Josue said to the people: Be ye sanctified: for to-morrow the Lord will do wonders among you. And he said to the priests: Take up the ark of the covenant, and go before the people. And they obeyed his commands, and took it up and walked before them.