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: and these stones shall be for a memorial to the children of Israel forever.
the waters of Jordan were cut off; which is repeated for the confirmation of it, and that it might be taken notice of as a very marvellous event, and to be ascribed to the divine omnipotence and goodness: