isaiah 46:11 Calling a ravenous bird from the east, the man that executeth my counsel from a far country: yea, I have spoken it, I will also bring it to pass; I have purposed it, I will also do it. - Free Bible Online

      11. ravenous bird--Cyrus so called on account of the rapidity of his marches from the distant regions of Persia to pounce on his prey (see on Isa 41:2; Isa 41:25; Jer 49:22; Eze 17:3). The standard of Cyrus, too, was a golden eagle on a spear (see the heathen historian, XENOPHON, 7, where almost the same word is used, aetos, as here, ayit).
      executeth my counsel-- (Isa 44:28; 45:13). Babylon represents, mystically, the apostate faction: the destruction of its idols symbolizes the future general extirpation of all idolatry and unbelief.
      purposed . . . also do it-- (Isa 43:13).

JFB.