And when he opened the seventh seal, there was silence in heaven [for] about half an hour.
References for Revelation 8:1
And I saw the seven angels who stand before God, and seven trumpets were given to them.
And another angel who had a golden censer came and stood at the altar, and a large amount of incense was given to him, in order that he could offer the prayers of all the saints on the golden altar that [is] before the throne.
And the smoke of the incense went up before God with the prayers of the saints from the hand of the angel.
And the angel took the censer and filled it with the fire from the altar and threw [it] to the earth, and there were thunders and sounds and lightnings and an earthquake.
And the seven angels who had the seven trumpets prepared themselves in order to blow them.
References for Revelation 8:6