'The Twelve' in the Bible

clear as crystal, Having a wall great and high, having twelve gates, and at the gates twelve angels, and the names written thereon, which are the names of the twelve tribes of the children of Israel: On the east three gates,

And the walls of the city had twelve foundations, and upon them the twelve names of the twelve apostles of the Lamb.

And the twelve gates were twelve pearls, each of the gates was of one pearl: and the street of the city was pure gold, transparent as glass.