'Nations of the Earth' in the Bible

Seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him?

And in your descendants shall all the nations of the earth be blessed; because you have obeyed my voice.

And I will make your descendants to multiply as the stars of heaven, and will give unto your descendants all these countries; and in your descendants shall all the nations of the earth be blessed;