Revelation 8:1-3

And when he had opened the seventh seal, there was silence in heaven about the space of half an hour.

And I saw the seven angels which stood before God; and to them were given seven trumpets.

And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne.