Jos 4:4-9

4Summoning the twelve men he had selected from among the Israelites, one from each tribe, 5Joshua said to them: “Go to the Jordan riverbed in front of the ark of the LORD, your God; lift to your shoulders one stone apiece, so that they will equal in number the tribes of the Israelites. 6In the future, these are to be a sign among you. When your children ask you,^* ‘What do these stones mean to you?’^c 7you shall answer them, ‘The waters of the Jordan ceased to flow before the ark of the covenant of the LORD when it crossed the Jordan.’^d Thus these stones are to serve as a perpetual memorial to the Israelites.” 8The twelve Israelites did as Joshua had commanded: they took up twelve stones from the Jordan riverbed as the LORD had said to Joshua, one for each of the tribes of the Israelites. They carried them along to the camp site, and there they placed them. 9Joshua set up the twelve stones that had been in the Jordan riverbed on the spot where the priests stood who were carrying the ark of the covenant. They are there to this day.