'The Twelve' in the Bible

having a great and high wall; having twelve gates, and at the gates twelve angels, and names inscribed, which are those of the twelve tribes of the sons of Israel.

And the wall of the city had twelve foundations, and on them twelve names of the twelve apostles of the Lamb.

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