'Holy City' in the Bible

Now the leaders of the people lived in Jerusalem, but the rest of the people cast lots to bring one out of ten to live in Jerusalem, the holy city, while nine-tenths remained in the other cities.

All the Levites in the holy city were 284.

“For they call themselves after the holy cityAnd lean on the God of Israel;The Lord of hosts is His name.

Awake, awake,Clothe yourself in your strength, O Zion;Clothe yourself in your beautiful garments,O Jerusalem, the holy city;For the uncircumcised and the uncleanWill no longer come into you.

“Seventy weeks have been decreed for your people and your holy city, to finish the transgression, to make an end of sin, to make atonement for iniquity, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the most holy place.