Revelation 21:12-17

21:12 It has a massive, high wall with twelve gates, with twelve angels at the gates, and the names of the twelve tribes of the nation of Israel are written on the gates. 21:13 There are three gates on the east side, three gates on the north side, three gates on the south side and three gates on the west side. 21:14 The wall of the city has twelve foundations, and on them are the twelve names of the twelve apostles of the Lamb.

21:15 The angel who spoke to me had a golden measuring rod with which to measure the city and its foundation stones and wall. 21:16 Now the city is laid out as a square, its length and width the same. He measured the city with the measuring rod at fourteen hundred miles (its length and width and height are equal). 21:17 He also measured its wall, one hundred forty-four cubits according to human measurement, which is also the angel’s.