Revelation 9:13
And the sixth angel sounded his trumpet. And I heard a voice from the four horns of the golden altar before God,
Exodus 30:2-3
A cubit shall be its length, and a cubit its breadth. It shall be square. And two cubits shall be the height of it, its horns from itself.
Hebrews 9:24
For Christ has not entered into the Holy of Holies made with hands, which are the figures of the true, but into Heaven itself, now to appear in the presence of God for us.
Hebrews 10:21
and having a High Priest over the house of God,
Revelation 8:3-5
And another angel came and stood at the altar, having a golden censer. And many incenses were given to him, so that he should offer it with the prayers of all saints on the golden altar before the throne.
Revelation 9:1
And the fifth angel sounded. And I saw a star fall from the heaven to the earth, and it was given the key of the abyss.