Rashi on Devarim 1:8 says that if it weren't for the sin with the spies, we would have never needed armaments. Bamidbar 14:25 tells us that Amalek lived in the valleys, and Devarim 25:29 states that ...
Devarim 3:11 desribes Og's bed as being made from iron. What does the the Torah add by describing Og's bed as being made from iron? The Ramban comments that it demonstrates how tall he was, that wood ...