Revelation 9:13

New American Bible - revised edition

Then the sixth angel blew his trumpet, and I heard a voice coming from the [four] horns of the gold altar before God,

Cross References

Exodus 30:10

Once a year Aaron shall purge its horns. Throughout your generations he is to purge it once a year with the blood of the atoning purification offering. This altar is most sacred to the Lord. Census Tax.

Hebrews 10:21

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

Hebrews 9:24

For Christ did not enter into a sanctuary made by hands, a copy of the true one, but heaven itself, that he might now appear before God on our behalf.

Revelation 8:2

And I saw that the seven angels who stood before God were given seven trumpets. The Gold Censer.

Revelation 9:1

Then the fifth angel blew his trumpet, and I saw a star that had fallen from the sky to the earth. It was given the key for the passage to the abyss.