Revelation 21:13-15

Amplified Bible

¹³ On the east side [there were] three gates, on the north three gates, on the south three gates, and on the west three gates. ¹⁴ And the wall of the city had twelve foundation stones, and on them the twelve names of the twelve apostles of the Lamb (Christ).

¹⁵ The one who was speaking with me had a gold measuring rod to measure the city, and its gates and its wall.