'Rod of Iron' in the Bible

and he shall rule them with a rod of iron, as the vessels of the potter are broken to pieces, as I also have received authority from My Father;

And she gave birth to a son, a male child, who is to rule all the nations with a rod of iron; and her child was caught up to God and to His throne.

From His mouth comes a sharp sword, so that with it He may strike down the nations, and He will rule them with a rod of iron; and He treads the wine press of the fierce wrath of God, the Almighty.