Joshua 4
As a memorial, men from each tribe of Israel carried a stone from the bottom of the Jordan river over to the place where they made camp that night. The stones would serve as a sign for the people to remember forever how the Lord had cut off the flow of the river when the priests carried the ark of the Lord across the Jordan. "He did this so that all the peoples of the earth might know that the hand of the LORD is powerful and so that you might always fear the LORD your God."