'Rod of Iron' in the Bible

and he shall rule them with a rod of iron, they shall be dashed in pieces like a potter's vessel: as I have also received of my Father.

And she brought forth a masculine son, who was to rule all nations with a rod of iron: and he child was suddenly taken up to God, even to his throne.

And there went out of his mouth a sharp sword, that with it he might smite the nations: and he shall govern them with a rod of iron; and he treads the wine press of the indignation and wrath of almighty God.