Passage
And the LORD shall do unto them as he did to Sihon and to Og, kings of the Amorites, and unto the land of them, whom he destroyed.
And the LORD shall do unto them as he did to Sihon and to Og, kings of the Amorites, and unto the land of them, whom he destroyed.
Deuteronomy 31:2 And he said unto them, I am an hundred and twenty years old this day; I can no more go out and come in: also the LORD hath said unto me, Thou shalt not go over this Jordan.
Deuteronomy 31:3 The LORD thy God, he will go over before thee, and he will destroy these nations from before thee, and thou shalt possess them: and Joshua, he shall go over before thee, as the LORD hath said.
Deuteronomy 31:4 And the LORD shall do unto them as he did to Sihon and to Og, kings of the Amorites, and unto the land of them, whom he destroyed.
Deuteronomy 31:5 And the LORD shall give them up before your face, that ye may do unto them according unto all the commandments which I have commanded you.
Deuteronomy 31:6 Be strong and of a good courage, fear not, nor be afraid of them: for the LORD thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee.
The verse centers on "lord", "shall", "sihon", "kings", "amorites", "land", and "destroyed". It is saying that the verse draws attention to "lord" and "shall", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 3's "The LORD thy God he will go..." into verse 5's "And the LORD shall give them up...", so "lord" and "shall" belong inside that flow. In Deuteronomy context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "lord" and "shall" with trust shaped by these words, not by a vague optimism outside the passage.