And he wrote there upon the stones a copy of the law of Moses,.... Not upon the stones of which the altar was made, though some have so thought; but upon other stones erected in the form of a pillar, and plastered over, Deu 27:4; which copy of the law was not the whole book of Deuteronomy, as some, at least only an abstract of the laws in it; but rather the decalogue, as Abarbinel; or the blessings and curses later read, as Ben Gersom: which he wrote in the presence of the children of Israel: they being witness of it, that he did what was enjoined.