'The Twelve' in the Bible

having a great and high wall; having twelve gates, and at the gates twelve angels; and names written on them, which are the names of the twelve tribes of the children of Israel.

The wall of the city had twelve foundations, and on them twelve names of the twelve Apostles of the Lamb.

The twelve gates were twelve pearls. Each one of the gates was made of one pearl. The street of the city was pure gold, like transparent glass.