'Nations' in the Bible

if thou now slayest this people as one man, then the nations that have heard thy fame will speak, saying,

For from the top of the rocks I see him, and from the hills I behold him: Lo, it is a people that shall dwell alone and shall not be reckoned among the nations.

God brought him out of Egypt; he hath as it were the strength of a buffalo. He shall consume the nations his enemies, and break their bones, and with his arrows shall smite them in pieces.

And he saw Amalek, and took up his parable, and said, Amalek is the first of the nations, but his latter end shall be for destruction.