5:2At that time the LORD said unto Joshua, Make thee sharp knives, and circumcise again the children of Israel the second time.
5:3And Joshua made him sharp knives, and circumcised the children of Israel at the hill of the foreskins.
5:4And this is the cause why Joshua did circumcise: All the people that came out of Egypt, that were males, even all the men of war, died in the wilderness by the way, after they came out of Egypt.
5:5Now all the people that came out were circumcised: but all the people that were born in the wilderness by the way as they came forth out of Egypt, them they had not circumcised.
5:6For the children of Israel walked forty years in the wilderness, till all the people that were men of war, which came out of Egypt, were consumed, because they obeyed not the voice of the LORD: unto whom the LORD sware that he would not shew them the land, which the LORD sware unto their fathers that he would give us, a land that floweth with milk and honey.
5:7And their children, whom he raised up in their stead, them Joshua circumcised: for they were uncircumcised, because they had not circumcised them by the way.
5:8And it came to pass, when they had done circumcising all the people, that they abode in their places in the camp, till they were whole.
5:9And the LORD said unto Joshua, This day have I rolled away the reproach of Egypt from off you. Wherefore the name of the place is called Gilgal unto this day.
Gilgal receives stones before it receives any spoils from Jericho. Israel's first permanent-looking installation inside the land is not a monument to a captured city. It is a reminder of a river nobody could have crossed that way without the LORD. The camp faces the next obstacle, but its memorial looks back. That is a deliberate arrangement of attention.
The stones also come with instructions for conversation. A father is not merely to identify the river or admire the workmanship. He must explain why Israel stands on this side of it. The answer joins the Jordan to the Red sea, gathering two generations into one history of deliverance without pretending they all witnessed the same event. What the earlier generation experienced at the sea, this generation has experienced at the river.
Then the explanation reaches beyond the family. All the people of the earth are to know the strength of the LORD's hand; Israel is to fear him continually. The same stones carry an outward testimony and an inward obligation. They are not there to congratulate Israel on excellent river management.