Revelation 9:13
The sixth angel sounded. I heard a voice from the horns of the golden altar which is before God,
Exodus 30:2-3
Its length shall be a cubit, and its breadth a cubit. It shall be square, and its height shall be two cubits. Its horns shall be of one piece with it.
Hebrews 9:24
For Christ hasn't entered into holy places made with hands, which are representations of the true, but into heaven itself, now to appear in the presence of God for us;
Hebrews 10:21
and having a great priest over the house of God,
Revelation 8:3-5
Another angel came and stood over the altar, having a golden censer. Much incense was given to him, that he should add it to the prayers of all the saints on the golden altar which was before the throne.
Revelation 9:1
The fifth angel sounded, and I saw a star from the sky which had fallen to the earth. The key to the pit of the abyss was given to him.