Revelation 9:13

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

Hebrews 9:24

For Christ did not enter a holy place made with hands, a copy of the true one, but into heaven itself, now to appear in the presence of God for us.

Hebrews 10:21

and since we have a great priest over the house of God,

Revelation 8:3-5

Another angel, who had a golden censer, came and stood at the altar. And he was given much incense to offer, with the prayers of all the saints, on the golden altar before the throne.

Revelation 9:1

And the fifth angel sounded his trumpet, and I saw a star which had fallen from heaven to earth; and he was given the key of the shaft 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 his trumpet, and I saw a star which had fallen from heaven to earth; and he was given the key of the shaft of the bottomless pit.

A voice

Revelation 8:3
Another angel, who had a golden censer, came and stood at the altar. And he was given much incense to offer, with the prayers of all the saints, on the golden altar before the throne.
Hebrews 9:24
For Christ did not enter a holy place made with hands, a copy of the true one, but into heaven itself, now to appear in the presence of God for us.
Hebrews 10:21
and since we have a great priest over the house of God,