Joshua 4:9

4:9 Joshua also set up twelve stones in the middle of the Jordan in the very place where the priests carrying the ark of the covenant stood. They remain there to this very day.

Joshua 4:18

4:18 The priests carrying the ark of the covenant of the Lord came up from the middle of the Jordan, and as soon as they set foot on dry land, the water of the Jordan flowed again and returned to flood stage.