'Rod of Iron' in the Bible

and he shall rule them with a rod of iron -- as the vessels of the potter they shall be broken -- as I also have received from my Father;

and she brought forth a male child, who is about to rule all the nations with a rod of iron, and caught away was her child unto God and His throne,

and out of his mouth doth proceed a sharp sword, that with it he may smite the nations, and he shall rule them with a rod of iron, and he doth tread the press of the wine of the wrath and the anger of God the Almighty,