rod, rods, measuring rod

Definition:

The term "rod" refers to a narrow, solid, stick-like tool that was used in several different ways. It was probably at least a meter in length.

A wooden rod was used by a shepherd to defend the sheep from other animals. It was also thrown toward a wandering sheep to bring it back to the the flock.
In Psalm 23, King David used the terms "rod" and "staff" as metaphors to refer to God's guidance and discipline for his people.
A shepherd's rod was also used to count the sheep as they passed under it.
Another metaphorical expression, "rod of iron," refers to God's punishment for people who rebel against him and do evil things.
In ancient times, measuring rods made of metal, wood, or stone were used to measure the length of a building or object.
In the Bible, a wooden rod was also referred to as an instrument to discipline children.