Revelation 21:12-14

The City shimmered like a precious gem, light-filled, pulsing light. She had a wall majestic and high with twelve gates. At each gate stood an Angel, and on the gates were inscribed the names of the Twelve Tribes of the sons of Israel: three gates on the east, three gates on the north, three gates on the south, three gates on the west. The wall was set on twelve foundations, the names of the Twelve Apostles of the Lamb inscribed on them.