'Nations' in the Bible

Now if you killed this people as one man, then the nations which have heard the fame of you will speak, saying,

For from the top of the rocks I see him. From the hills I see him. Behold, it is a people that dwells alone, and shall not be reckoned among the nations.

God brings him out of Egypt. He has as it were the strength of the wild ox. He shall eat up the nations his adversaries, shall break their bones in pieces, and pierce them with his arrows.

He looked at Amalek, and took up his parable, and said, "Amalek was the first of the nations, But his latter end shall come to destruction."