Revelation 21:14 YLT

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;