Revelation 9:13

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

Hebrews 9:24

for Christ is not entred into a sanctuary made by human art, such as is only representative of the true one, but into heaven itself, to appear from henceforth in the presence of God on our behalf:

Hebrews 10:21

and having an high priest, who is established over the house of God,

Revelation 8:3-5

and another angel came and stood at the altar, having a golden censer; and there was given to him much incense, that he should offer it 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 unto the earth: and to him was given the key of the bottomless pit.

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 unto the earth: and to him was given the key of the bottomless pit.

A voice

Revelation 8:3
and another angel came and stood at the altar, having a golden censer; and there was given to him much incense, that he should offer it with the prayers of all the saints upon the golden altar, which was before the throne.
Hebrews 9:24
for Christ is not entred into a sanctuary made by human art, such as is only representative of the true one, but into heaven itself, to appear from henceforth in the presence of God on our behalf:
Hebrews 10:21
and having an high priest, who is established over the house of God,