Thematic Bible: The measurement of the temple

Then there was given to me a measuring stick that looked like a [tree] branch. I was told [Note: Neither the giver nor the speaker are identified], "Get up and measure the Temple of God, and the Altar and [count] those who worship there, but do not include the court on the outside of the Temple in your measurements, because it has been given to the [unconverted] Gentiles. And they will trample underfoot the holy city [i.e., Jerusalem ? See 21:10] for forty-two months.