The children of Israel did so as Joshua commanded, and took up twelve stones out of the midst of the Jordan, as Yahweh spoke to Joshua, according to the number of the tribes of the children of Israel; and they carried them over with them to the place where they lodged, and laid them down there.
      II. According to these orders the thing was done. 1. Twelve stones were taken up out of the midst of Jordan, and carried in the sight of the people to the place where they had their head-quarters that night, Joshua 4:8; Joshua 4:8. It is probable that the stones they took were as big as they could well carry, and as near as might be of a size and shape. But whether they went away with them immediately to the place, of whether they staid to attend the ark, and kept pace with the solemn procession of that, to grace its triumphant entry in to Canaan, is not certain. By these stones which they were ordered to take up God did, as it were, give them livery and seisin of this good land; it is all their own, let them enter and take possession; therefore what these twelve did the children of Israel are said to do (Joshua 4:8; Joshua 4:8), because they were the representatives of their respective tribes. In allusion to this, we may observe that when the Lord Jesus, our Joshua, having overcome the sharpness of death and dried up that Jordan, had opened the kingdom of heaven to all believers, he appointed his twelve apostles according to the number of the tribes of Israel, by the memorial of the gospel to transmit the knowledge of this to remote places and future ages. 2. Other twelve stones (probably much larger than the other, for we read not that they were each of them one man's load) were set up in the midst of Jordan (Joshua 4:9; Joshua 4:9), piled up so high in a heap or pillar as that the top of it might be seen above the water when the river was low, or seen in the water when it was clear, or at least the noise of commotion of the water passing over it would be observable, and the bargemen would avoid it, as they do a rock. Some way or other, it is likely, it was discernible, so as to notify the very place where the ark stood, and to serve for a duplicate to the other monument, which was to set up on dry land in Gilgal, for the confirming of its testimony and the preserving of its tradition. The sign being doubled, no doubt the thing was certain.