'Nations' in the Bible

to whom God did will to make known what is the riches of the glory of this secret among the nations -- which is Christ in you, the hope of the glory,

a renewal in which there is no [distinction between] Greek and Jew, circumcised and uncircumcised, [nor between nations whether] barbarian or Scythian, [nor in status whether] slave or free, but Christ is all, and in all [so believers are equal in Christ, without distinction].