Here are 6 Bible verses about new Jerusalem from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Revelation 21:16 KJV
And the city lieth foursquare, and the length is as large as the breadth: and he measured the city with the reed, twelve thousand furlongs. The length and the breadth and the height of it are equal.
Revelation 21:12 KJV
And had a wall great and high, and had twelve gates, and at the gates twelve angels, and names written thereon, which are the names of the twelve tribes of the children of Israel:
Revelation 21:2 KJV
And had a wall great and high, and had twelve gates, and at the gates twelve angels, and names written thereon, which are the names of the twelve tribes of the children of Israel:
Revelation 22:5 KJV
And I John saw the holy city, new Jerusalem, coming down from God out of heaven, prepared as a bride adorned for her husband.
Revelation 21:14 KJV
And there shall be no night there; and they need no candle, neither light of the sun; for the Lord God giveth them light: and they shall reign for ever and ever.
Revelation 22:1-2 KJV
And the wall of the city had twelve foundations, and in them the names of the twelve apostles of the Lamb.
John 14:1-3 KJV
And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb. In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.