Laid them down there - i. e. in Gilgal Joshua 4:20. Spoken of as the doers of this, because it was done by the twelve who acted for them.
Related Commentaries of Joshua 4:8
Joshua 4:8
8 And the children of Israel did so as Joshua commanded, and took up twelve stones out of the midst of Jordan, as the LORD spake unto Joshua, according to the number of the tribes of the children of Israel, and carried them over with them unto the place where they lodged, and laid them down there.