Deuteronomy 1:19

"And we journeyed from Horeb, and went through all that great and terrible wilderness which ye saw, by the way to the hill-country of the Amorites, As Jehovah our God commanded us; and we came to Kadesh-barnea. And I said unto you, Ye are come unto the hill-country of the Amorites, which Jehovah our God giveth unto us. Behold, Jehovah thy God hath set the land before thee: go up, take possession, as Jehovah, the God of thy fathers, hath spoken unto thee; fear not, neither be dismayed. And ye came near unto me, every one of you, and said, Let us send men before us, that they may search the land for us, and bring us word again of the way by which we must go up, and the cities unto which we shall come. And the thing pleased me well; and I took twelve men of you, one man for every tribe: and they turned and went up into the hill-country, and came unto the valley of Eschol, and spied it out. And they took of the fruit of the land in their hands, and brought it down unto us, and brought us word again, and said, It is a good land which Jehovah our God giveth unto us."

There is a fuller account of all this in Numbers 13 and Numbers 14. This is something in the nature of a summary that Moses gave here. One feature of this speech and of all of Deuteronomy is that Moses speaks in the first person throughout! Can it be supposed for a moment that an impersonator seeking to have a book accepted as coming from Moses when indeed it did not, would have made this radical change to the first person instead of following the pattern of the other Books of Moses, in which God is invariably represented as speaking through Moses? It is impossible to imagine such a thing. Only Moses could have made this change, certainly not some forger trying to sound like Moses!