6 so you'll have something later to mark the occasion. When your children ask you, 'What are these stones to you?' 7 you'll say, 'The flow of the Jordan was stopped in front of the Chest of the Covenant of God as it crossed the Jordan - stopped in its tracks. These stones are a permanent memorial for the People of Israel.'" 8 The People of Israel did exactly as Joshua commanded: They took twelve stones from the middle of the Jordan - a stone for each of the twelve tribes, just as God had instructed Joshua - carried them across with them to the camp, and set them down there.
Matthew Henry's Commentary on Joshua 4:6-8
Commentary on Joshua 4:1-9
(Read Joshua 4:1-9)
The works of the Lord are so worthy of rememberance, and the heart of man is so prone to forget them, that various methods are needful to refresh our memories, for the glory of God, our advantage, and that of our children. God gave orders for preparing this memorial.