Joshua 4:15

“And the Lord spake unto Joshua, etc.] When all the people had passed over jordan: saying; as follows.”

“The passage of the priests to the further bank had been already referred to, Joshua 4:11; but the writer, in observance of his general plan (compare introductory remarks to Joshua 3:0), re-introduces it here as the leading feature in the concluding section of his account, and (as before) with mention of God’s special direction about it. The statement that on the removal of the ark the waters of Jordan at once returned to their former level Joshua 4:18, heightens the impression which is especially inculcated throughout - that the whole transaction was extraordinary and miraculous. The details and incidents of the passage are no doubt open to manifold discussion: but all such discussion will…”

“Termination of the miraculous Passage through the Jordan. - As soon as the priests left their standing-place in the river with the ark of the covenant, according to the command of God made known to them by Joshua, and the soles of their feet "tore themselves loose upon the dry ground" (נתּקוּ אל החרבה, constructio praegnans, for they tore themselves loose from the soft soil of the river, and trode upon the dry or firm ground), the waters of the Jordan returned again to their place, and went over all its banks as before (vid., Jos 3:15). This affirms as clearly as possible that it was the ark which kept back the stream. Joshua 4:19”