Incense: Symbolical of the Prayers of Saints
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Revelation 5:8
When He had taken the scroll, the four living creatures and the twenty-four elders fell down before the Lamb. Each one had a harp, and they were holding golden bowls full of incense, which are the prayers of the saints.
Revelation 8:3, 4
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. / And the smoke of the incense, together with the prayers of the saints, rose up before God from the hand of the angel.