Altar of Incense: Seen in John's Vision
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Revelation 8:3
Then another angel, who had a golden censer, came and stood at the altar. He was given much incense to offer, along with the prayers of all the saints, on the golden altar before the throne.
Revelation 9:13
Then the sixth angel sounded his trumpet, and I heard a voice from the four horns of the golden altar before God