'The Twelve' in the Bible

It had a great high wall, in which were twelve gates; and at these gates there were twelve angels, and there were names inscribed on the gates, the names of the twelve tribes of the Israelites.

The wall of the City had twelve foundation stones, on which were the twelve names of the twelve Apostles of the Lamb.

The twelve gates were made of twelve pearls, each gate of one pearl. The street of the City was of pure gold, transparent as glass.