It is to be especially remarked that God took into His own hands the prescription of the method by which this great event was to be commemorated. It seems as if He could not trust the people to do it in a way that would be free from objection and from evil tendency. It was assumed that the event was worthy of special commemoration. True, indeed, there had been no special commemoration of the passage of the sea, but then the Passover was instituted so near to that event that it might serve as a memorial of it as well as of the protection of the Israelites when the firstborn of the Egyptians was slain. And generally the people had been taught, what their own hearts in some degree recognised, that great mercies should be specially commemorated. The Divine method of commemorating the drying up of the Jordan was a very simple one. In the first place, twelve men were selected, one from every tribe, to do the prescribed work. The democratic constitution of the nation was recognised--each tribe was to take part in it; and as it was a matter in which all were concerned, each person was to take part in the election of the representative of his tribe. Then each of these twelve representatives was to take from the bed of the river, from the place where the priests had stood with the ark, a stone, probably as large as he could carry. The twelve stones were to be carried to the place where the host lodged that night, and to be erected as a standing memorial of the miracle. It was a very simple memorial, but it was all that was needed. It was not like the proud temples or glorious pyramids of Egypt, reared as these were to give glory to man more than to God. It was like Jacob's pillar before, or Samuel's Ebenezer afterwards; void of every ornament or marking that could magnify man, and designed for one single purpose--to recall the goodness of God.
It would appear, from chap. iv. 9, that two sets of stones were set up, Joshua, following the spirit of the Divine direction, having caused a second set to be erected in the middle of the river on the spot where the priests had stood. Some have supposed that that verse is an interpolation of later date; but, as it occurs in all the manuscripts, and as it is expressly stated in the Septuagint and Vulgate versions that this was a different transaction from the other, we must accept it as such. The one memorial stood on the spot where the ark had indicated the presence of God, the other where the first encampment of the host had shown God's faithfulness to His word. Both seemed to proclaim the great truth afterwards brought out in the exquisite words of the psalm--"God is our refuge and our strength; a very present help in time of trouble." They might not be needed so much for the generation that experienced the deliverance; but in future generations they would excite the curiosity of the children, and thus afford an opportunity to the parents to rehearse the transactions of that day, and thrill their hearts with the sense of God's mercy.
Among devout Israelites, that day was never forgotten. The crossing of the Jordan was coupled with the crossing of the sea, as the two crowning tokens of God's mercy in the history of Israel, and the most remarkable exhibitions of that Divine power which had been so often shown among them. In that wailing song, the seventy-fourth psalm, where God's wonderful works of old are contrasted in a very sad spirit with the unmitigated desolations that met the writer's eye, almost in the same breath in which he extols the miracle of the sea, "Thou didst divide the sea by Thy strength," he gives thanks for the miracle of the river, "Thou didst cleave the fountain and the flood: Thou driedst up mighty rivers." And in a song, not of wailing, but of triumph, the hundred and fourteenth psalm, we have the same combination:--