'Rod of Iron' in the Bible

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

And she brought forth a male child, that was to rule all nations with a rod of iron; and her child was caught away to God, even to his throne.

And out of his mouth goes a sharp, two-edged sword, that with it he may smite the nations; and he shall rule them with a rod of iron; and he treads the wine-press of the fiercest wrath of God, the Almighty.