Deuteronomy 27:3

And thou shalt write upon them all the words of this law, when thou art passed over, that thou mayest go in unto the land which the LORD thy God giveth thee, a land that floweth with milk and honey; as the LORD God of thy fathers hath promised thee.

Thou shalt write upon them all the words of this law - not certainly the whole five books of Moses, nor even the abridgment of it given in this book of Deuteronomy. It might be, as Kennicott thinks, the Decalogue; but a greater probability is, that it was the 'blessings and curses'-which comprised, in fact, an epitome of the law (Joshua 8:34).

That thou mayest go in unto the land which the Lord thy God giveth thee. This public and solemn ceremonial was evidently intended as a national expression, at the moment of Israel's entering into possession of the promised land, of their obligation to keep with faithfulness all the laws of God.