41 It happened, when all the nation had completely passed over the Jordan, that Yahweh spoke to Joshua, saying, 2 “Take twelve men out of the people, out of every tribe a man, 3 and command them, saying, ‘Take from out of the middle of the Jordan, out of the place where the priests’ feet stood firm, twelve stones, and carry them over with you, and lay them down in the lodging place, where you will lodge tonight.’” 4 Then Joshua called the twelve men, whom he had prepared of the children of Israel, out of every tribe a man. 5 Joshua said to them, “Pass over before the ark of Yahweh your God into the middle of the Jordan, and each of you pick up a stone and put it on your shoulder, according to the number of the tribes of the children of Israel; 6 that this may be a sign among you, that when your children ask in time to come, saying, ‘What do you mean by these stones?’ 7 then you shall tell them, ‘Because the waters of the Jordan were cut off before the ark of the covenant of Yahweh. When it passed over the Jordan, the waters of the Jordan were cut off. These stones shall be for a memorial to the children of Israel forever.’”
Matthew Henry's Commentary on Joshua 4:1-7
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.