Measuring the Temple and the Holy City

Revelation 11:1-2

And there was given to me a reed like to a rod, and the messenger stood, saying, `Rise, and measure the sanctuary of God, and the altar, and those worshipping in it;

and the court that is without the sanctuary leave out, and thou mayest not measure it, because it was given to the nations, and the holy city they shall tread down forty-two months;