This is from Revelation 21. The chapter is about the new Jerusalem, not the old one that everyone has been fighting over since Biblical times.

21:10. And he carried me away in the spirit to a great and high mountain, and showed me that great city, the holy Jerusalem, descending out of heaven from God,

21:11. Having the glory of God: and her light was like unto a stone most precious, even like a jasper stone, clear as crystal;

21:12. And had a wall great and high, and had twelve gates, and at the gates twelve angels, and names written thereon, which are the names of the twelve tribes of the children of Israel:

21:13. On the east three gates; on the north three gates; on the south three gates; and on the west three gates.

21:14. And the wall of the city had twelve foundations, and in them the names of the twelve apostles of the Lamb.

Question: Does one of those twelve foundations carry the name of Judas Iscariot? Just asking.