'Staff' in the Bible

Then there was given to me a measuring rod like a staff; and someone said, “Rise and measure the temple of God and the altar [of incense], and [count] those who worship in it.

And she gave birth to a Son, a male Child, who is destined to rule (shepherd) 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 (His word) with which He may strike down the nations, and He will rule them with a rod of iron; and He will tread the wine press of the fierce wrath of God, the Almighty [in judgment of the rebellious world].