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.
So Joshua [verse nine] set up twelve stones in the midst of Jordan, in the place where the feet of the priests that bare the ark of the covenant stood: they're there to this day ( Joshua 4:9 ).