'The Twelve' in the Bible

and she had a great wall and lofty, having twelve gates, and at the gates twelve angels, and names inscribed on them, which are those of the twelve tribes of the children of Israel.

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

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