Revelation 21:12

It had a great, high wall, with twelve gates, and at the gates twelve angels, and on the gates were written the names of the twelve tribes of the sons of Israel.

Revelation 21:25

In the daytime (for there will be no night there) its gates will never be shut;

Matthew 18:10

"See that you do not despise one of these little ones. For I tell you that in heaven their angels always see the face of my Father who is in heaven.

Luke 15:10

In the same way, I tell you, there is joy in the presence of the angels of God over one sinner who repents."

Luke 16:22

So the beggar died, and was carried by the angels to Abraham's bosom. The rich man also died and was buried.

Acts 26:7

the promise to which our twelve tribes hope to attain, as they earnestly serve God night and day. And for this hope, O King, I am being accused by Jews.

Hebrews 1:14

Are they not all ministering spirits, sent forth to serve for the sake of those who will inherit salvation?

Revelation 7:4-8

And I heard the number of those who were sealed, one hundred and forty-four thousand sealed from every tribe of the sons of Israel:

Revelation 21:17-21

He also measured its wall, a hundred and forty-four cubits by a man's measure, which is also an angel's.

Treasury of Scripture Knowledge

Summary

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:

Twelve gates

Bible References

Twelve gates

Revelation 21:21
And the twelve gates were twelve pearls, each of the gates made of a single pearl. And the street of the city was pure gold, like transparent glass.

Twelve angels

Matthew 18:10
"See that you do not despise one of these little ones. For I tell you that in heaven their angels always see the face of my Father who is in heaven.
Luke 15:10
In the same way, I tell you, there is joy in the presence of the angels of God over one sinner who repents."
Luke 16:22
So the beggar died, and was carried by the angels to Abraham's bosom. The rich man also died and was buried.
Hebrews 1:14
Are they not all ministering spirits, sent forth to serve for the sake of those who will inherit salvation?

And names

Revelation 7:4
And I heard the number of those who were sealed, one hundred and forty-four thousand sealed from every tribe of the sons of Israel:
Acts 26:7
the promise to which our twelve tribes hope to attain, as they earnestly serve God night and day. And for this hope, O King, I am being accused by Jews.