“Command the priests carrying the ark of the covenant law to come up out of the Jordan.”
References for Joshua 4:16
So Joshua commanded the priests, “Come up out of the Jordan.”
And the priests came up out of the river carrying the ark of the covenant of the LORD. No sooner had they set their feet on the dry ground than the waters of the Jordan returned to their place and ran at flood stage as before.
References for Joshua 4:18