Revelation 9:13

And the sixth angel sounded, and I heard a great voice from the four horns of the altar of gold which is before God,

Hebrews 9:24

For Christ is not entered into the holies made with hands, the antitypes of the true; but into heaven itself, now to appear before the presence of God for us:

Hebrews 10:21

and having a great priest over the house of God,

Revelation 8:3-5

And another angel came, and stood by the altar, holding a golden censer; and there were given to him many perfumes, to offer with the prayers of all the saints upon the golden altar which was before the throne.

Revelation 9:1

AND the fifth angel sounded, and I saw a star fall from heaven to the earth; and to him was given the key of the pit of the abyss [of hell].

Treasury of Scripture Knowledge

Summary

And the sixth angel sounded, and I heard a voice from the four horns of the golden altar which is before God,

The sixth

Bible References

The sixth

Revelation 9:1
AND the fifth angel sounded, and I saw a star fall from heaven to the earth; and to him was given the key of the pit of the abyss [of hell].

A voice

Revelation 8:3
And another angel came, and stood by the altar, holding a golden censer; and there were given to him many perfumes, to offer with the prayers of all the saints upon the golden altar which was before the throne.
Hebrews 9:24
For Christ is not entered into the holies made with hands, the antitypes of the true; but into heaven itself, now to appear before the presence of God for us:
Hebrews 10:21
and having a great priest over the house of God,