Revelation 21:14-16

Darby Translation

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

¹⁵ And he that spoke with me had a golden reed [as] a measure, that he might measure the city, and its gates, and its wall.

¹⁶ And the city lies four-square, and its length [is] as much as the breadth. And he measured the city with the reed—twelve thousand stadia: the length and the breadth and height of it are equal.