7you are to tell them, ‘The waters of the Jordan were cut off before the ark of the covenant of the LORD. When it crossed the Jordan, the waters were cut off.’ Therefore these stones will be a memorial to the Israelites forever.”
8Thus 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 4:7-8