Joshua 4:9 - Joseph Benson’s Commentary on the Old and New Testaments

Joshua set up twelve stones in the midst of Jordan These stones are not the same with those mentioned Joshua 4:5, which a man might carry upon his shoulder. They were undoubtedly very much larger, and probably appeared above the surface of the water, when it was low; or, if not, might be seen in it, either from the shore, the river not being broad, or in crossing it by boats, the waters of Jordan being generally very clear. At least they were so placed as to show that they were some monument of art, and erected there when the channel of the river was dry. They are there unto this day That is, unto the time when this history was written, which might not be till many years after the facts were done, recorded in it. Or, it might be added by Joshua himself in his old age, or by some other holy and divinely-inspired man, who inserted this and some such passages, both in this book and in the writings of Moses.