Revelation 21:12

clear as crystal, Having a wall great and high, having twelve gates, and at the gates twelve angels, and the names written thereon, which are the names of the twelve tribes of the children of Israel: On the east three gates,

Treasury of Scripture Knowledge

Summary

And behold a wall on the outside of the house round about, and in the man's hand a measuring reed of six cubits long by the cubit and an hand breadth: so he measured the breadth of the building, one reed; and the height, one reed.

Bible References

A wall

Revelation 21:12
clear as crystal, Having a wall great and high, having twelve gates, and at the gates twelve angels, and the names written thereon, which are the names of the twelve tribes of the children of Israel: On the east three gates,