Oh really? I was always under the impression that the first five were given at Sinai. Where did you read that? I'd be curious to read it.
In Deuteronomy.
Deuteronomy 1
1 These be the words which Moses spake unto all Israel on this side Jordan in the wilderness, in the plain over against the Red sea, between Paran, and Tophel, and Laban, and Hazeroth, and Dizahab.
2 (There are eleven days' journey from Horeb by the way of mount Seir unto Kadeshbarnea.)
3
And it came to pass in the fortieth year, in the eleventh month, on the first day of the month, that Moses spake unto the children of Israel, according unto all that the Lord had given him in commandment unto them;
4 After he had slain Sihon the king of the Amorites, which dwelt in Heshbon, and Og the king of Bashan, which dwelt at Astaroth in Edrei:
5 On this side Jordan, in the land of Moab, began Moses to declare this law, saying,
6 The Lord our God spake unto us in Horeb, saying, Ye have dwelt long enough in this mount:
Very clearly after they were turned away from the land the first time in their unbelief:
34 And the Lord heard the voice of your words, and was wroth, and sware, saying,
35 Surely there shall not one of these men of this evil generation see that good land, which I sware to give unto your fathers.
36 Save Caleb the son of Jephunneh; he shall see it, and to him will I give the land that he hath trodden upon, and to his children, because he hath wholly followed the Lord.
37 Also the Lord was angry with me for your sakes, saying, Thou also shalt not go in thither.
Much love!