Revelation 9:13

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

Exodus 30:2-3

a cubit long, and a cubit broad, even foursquare shall it be and two cubits, high: with horns proceeding out of it,

Hebrews 9:24

For Christ is not entered into the holy places, that are made with hands, which are but similitudes of true things: but is entered into very heaven, for to appear now in the sight of God for us.

Hebrews 10:21

And seeing also that we have a high priest which is ruler over the house of God,

Revelation 8:3-5

And another angel came and stood before the altar having a golden censer, and much of odours was given unto him, that he should offer of the prayers of all saints upon the golden altar, which was before the seat.

Revelation 9:1

And the fifth angel blew, 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 blew, 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 before the altar having a golden censer, and much of odours was given unto him, that he should offer of the prayers of all saints upon the golden altar, which was before the seat.
Hebrews 9:24
For Christ is not entered into the holy places, that are made with hands, which are but similitudes of true things: but is entered into very heaven, for to appear now in the sight of God for us.
Hebrews 10:21
And seeing also that we have a high priest which is ruler over the house of God,