Revelation 21:13

10 and he carried me away in the Spirit to a mountain great and high, and did shew to me the great city, the holy Jerusalem, coming down out of the heaven from God,

11 having the glory of God, and her light [is] like a stone most precious, as a jasper stone clear as crystal,

12 having also a wall great and high, having twelve gates, and at the gates twelve messengers, and names written thereon, which are [those] of the twelve tribes of the sons of Israel,

13 at the east three gates, at the north three gates, at the south three gates, at the west three gates;

14 and the wall of the city had twelve foundations, and in them names of the twelve apostles of the Lamb.

15 And he who is speaking with me had a golden reed, that he may measure the city, and its gates, and its wall;

16 and the city lieth square, and the length of it is as great as the breadth; and he did measure the city with the reed -- furlongs twelve thousand; the length, and the breadth, and the height, of it are equal;