Adam Clarke on Hosea 8:1

Set the trumpet to thy mouth - Sound another alarm. Let them know that an enemy is fast approaching.

As an eagle against the house of the Lord - of this be a prophecy against Judah, as some have supposed, then by the eagle Nebuchadnezzar is meant, who is often compared to this king of birds. See Eze 17:3; Jer 48:40; Jer 49:22; Dan 7:4.

But if the prophecy be against Israel, which is the most likely, then Shalmaneser, king of Assyria, is intended, who, for his rapidity, avarice, rapacity, and strength, is fitly compared to this royal bird. He is represented here as hovering over the house of God, as the eagle does over the prey which he has just espied, and on which he is immediately to pounce.