The children of Israel did so as Joshua commanded, and took up twelve stones out of the midst of the Jordan, as Yahweh spoke to Joshua, according to the number of the tribes of the children of Israel; and they carried them over with them to the place where they lodged, and laid them down there.
Unger also discerned that, "The stones left in the swirling Jordan to be overwhelmed by its waters are mementos of Christ's death under judgment in the believer's place."[2]