Revelation 8:1

And when be had opened the seventh seal, there was silence in heaven about haft an hour.

Revelation 6:1

And I saw when the Lamb opened one of the seven seals, and I heard, as it were the voice of thunder, one of the four living creatures saying, Come!

Revelation 5:1

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

Revelation 6:3

And when he had opened the second seal, I heard the second living creature saying, Come!

Revelation 6:5

And when he had opened the third seal, I heard the third living creature saying, Come! And I saw, and lo! a black horse, and he that sat on him, having a pair of scales in his hand.

Revelation 6:7

And when he had opened the fourth seal, I heard the fourth living creature saying, Come!

Revelation 6:9

And when he had opened the fifth seal, I saw under the altar the souls of them that were slain on account of the word of God, and on account of 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 whole moon became as blood,

Revelation 5:9

And they sing a new song, saying, Thou art worthy to take the book, and to open its seals; for thou wast slain, and hast redeemed to God by thy blood men 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 sat on the throne a book written within and without, sealed fast with seven seals.
Revelation 6:1
And I saw when the Lamb opened one of the seven seals, and I heard, as it were the voice of thunder, one of the four living creatures saying, Come!