'Holy City' in the Bible

So the leaders of the people settled in Jerusalem, while the rest of the people cast lots to bring one out of every ten to settle in Jerusalem, the holy city, while the other nine remained in other cities.

The sum total of the Levites in the holy city was 284.

Indeed, they live in the holy city; they trust in the God of Israel, whose name is the Lord who commands armies.

Wake up! Wake up! Clothe yourself with strength, O Zion! Put on your beautiful clothes, O Jerusalem, holy city! For uncircumcised and unclean pagans will no longer invade you.

"Seventy weeks have been determined concerning your people and your holy city to put an end to rebellion, to bring sin to completion, to atone for iniquity, to bring in perpetual righteousness, to seal up the prophetic vision, and to anoint a most holy place.