Joshua 4:9-10

9And twelve stones did Joshua set up in the midst of the Jordan, in the place where the feet of the priests who bore the ark of the covenant had stood firm; and they are there to this day.

10And the priests who bore the ark stood in the midst of the Jordan, until everything was finished that Jehovah had commanded Joshua to speak unto the people, according to all that Moses had commanded Joshua. And the people hasted and passed over.