Moses
Deuteronomy 1:20ESV·traditional attribution

And I said to you, ‘You have come to the hill country of the Amorites, which the LORD our God is giving us.

Matthew Henry Presbyterian @wholebiblehenry

Moses here makes a large rehearsal of the fatal turn which was given to their affairs by their own sins, and God's wrath, when, from the very borders of Canaan, the honour of conquering it, and the pleasure of possessing it, the whole generation was hurried back into the wilderness, and their carcases fell there. It was a memorable story; we read it Num.

Commenting on Deuteronomy 1:19-46

John Gill Reformed Baptist @doctorgill

And I said unto you, you are come unto the mountain of the Amorites,.... Which was inhabited by them, and was one of the seven nations the Israelites were to destroy, and possess their land, and which lay on the southern part of the land of Canaan: which the Lord our God doth give unto us; not the mountain only, but the whole country of...

Geneva Bible Notes Reformed @genevanotes

And I said unto you, Ye are come unto the mountain of the Amorites, which the LORD our God doth give unto us. (n) So that the fault was in themselves, that they did not sooner possess the inheritance promised.