Isaiah says the same thing in two different ways to emphasize that God will use another nation to punish his people. Alternate translation: "He will call for the army of a nation that is far away from Judah and tell them to come." (See: [[rc://en/ta/man/translate/figs-parallelism]])
These words mean basically the same thing and are used for emphasis. Alternate translation: "very quickly." (See: [[rc://en/ta/man/translate/figs-doublet]])