Revelation 8:1

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

Revelation 6:1

And I saw when the Lamb opened the first of the seven seals, and I heard one of the four living creatures saying, with a voice like thunder, Come and see.

Revelation 5:1

And I saw in the right hand of him that sits on the throne, a book written within and without, sealed with seven seals.

Revelation 6:3

And when he had opened the second seal, I heard the second living creature say, Come and see.

Revelation 6:5

And when he had opened the third seal, I heard the third living creature say, Come and see. And I saw, and behold, a black horse; and he that sat on him had a pair of scales in his hand.

Revelation 6:7

And when he had opened the fourth seal, I heard the voice of the fourth living creature say, Come and see.

Revelation 6:9

And when he had opened the fifth seal, I saw under the altar the souls of those who had been slain for the word of God, and for the testimony which they had borne:

Revelation 6:12

And I saw when he had opened the sixth seal; and there was a great earthquake, and the sun became black as sackcloth of hair, and the moon became like blood:

Revelation 5:9

And they sung a new song, saying: Thou art worthy to take the book, and to open its seals: for thou wast slain, and hast redeemed us to God by thy blood, out of every tribe and tongue and people and nation:

Treasury of Scripture Knowledge

Summary

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

Bible References

And

Revelation 5:1
And I saw in the right hand of him that sits on the throne, a book written within and without, sealed with seven seals.
Revelation 6:1
And I saw when the Lamb opened the first of the seven seals, and I heard one of the four living creatures saying, with a voice like thunder, Come and see.