Joshua 4:19-24
The people came up out of the Jordan on the tenth day of the first month, and they camped in Gilgal on the east border of Jericho. Those twelve stones, which they had taken out of the Jordan, Joshua set up in Gilgal, saying to the Israelites, "When your children ask their parents in time to come, 'What do these stones mean?' then you shall let your children know, 'Israel crossed over the Jordan here on dry ground.' For the Lord your God dried up the waters of the Jordan for you until you crossed over, as the lord your God did to the Red Sea, which he dried up for us until we crossed over, so that all the peoples of the earth may know that the hand of the Lord is mighty, and so that you may fear the Lord your God forever."