Thus the Israelites did as Joshua had commanded them. They took up twelve stones from the middle of the Jordan, one for each tribe of Israel, just as the LORD had told Joshua; and they carried them to the camp, where they set them down.

Joshua 4:20
And there at Gilgal Joshua set up the twelve stones they had taken from the Jordan.

Joshua 4:9
Joshua also set up twelve stones in the middle of the Jordan, in the place where the priests who carried the ark of the covenant stood. And the stones are there to this day.

And the children of Israel did so as Joshua commanded, and took up twelve stones out of the middle of Jordan, as the LORD spoke to Joshua, according to the number of the tribes of the children of Israel, and carried them over with them to the place where they lodged, and laid them down there.