Revelation 9:13 Revelation 9:13 And the sixth angel sounded, and I heard a voice from the four horns of the golden altar which is before God, The angel that sounded the second “ woe” trumpet, was those faithful orthodox ministers who in that age lifted up their voice like a trumpet against popish idolatry, image worship, and other superstitions of the Roman clergy. And I heard a voice from the four horns of the golden altar which is before God. This voice was the voice of Christ, who stands at the altar before God. See KNOLLYS: Revelation 8:3  See KNOLLYS: Revelation 8:4 See KNOLLYS: Revelation 8:5 that gave order and command, and direction to this sixth angel what he should do; as appears in the next verse.