Revelation 21:10-14

So he took me in the Spirit to a great, high mountain, and he showed me the holy city, Jerusalem, descending out of heaven from God. It shone with the glory of God and sparkled like a precious stone—like jasper as clear as crystal. The city wall was broad and high, with twelve gates guarded by twelve angels. And the names of the twelve tribes of Israel were written on the gates. There were three gates on each side—east, north, south, and west. The wall of the city had twelve foundation stones, and on them were written the names of the twelve apostles of the Lamb.