'Holy City' in the Bible

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.

And I [also] saw the holy city, the new Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband.

So, he transported me away in [i.e., under the influence of] the Holy Spirit, to a very high mountain and showed me the holy city Jerusalem, coming down out of heaven from God.

And if anyone takes away from the words of this book of prophecy, God will take away his share in the tree of life and in the holy city, which are described in this book.