'Nations' in the Bible

The vision of Obadiah.Thus says the Lord God concerning Edom—We have heard a report from the Lord,And an ambassador has been sent among the nations, saying,“Arise, and let us rise up against Edom for battle [with the Lord as commander]!”

“Behold [Edom], I shall [humiliate you and] make you small among the nations;You are greatly despised.

“For the [judgment] day of the Lord draws near on all the nations.As you have done, it shall be done to you [in retribution];Your [evil] dealings will return on your own head.

“Because just as you [Edom] drank on My holy mountain [desecrating it in the revelry of the destroyers],So shall all the nations drink continually [one by one, of My wrath];Yes, they shall drink and swallow [the full measure of punishment]And become as though they had never existed.