Revelation 8:1

When the Lamb opened the seventh seal, there was silence in heaven for about half an hour.

Revelation 6:1

Then I saw when the Lamb opened one of the seven seals. And I heard one of the four living creatures say, as with a voice of thunder, "Come!"

Revelation 5:1

I saw in the right hand of him who sat on the throne a scroll written inside and on the back, sealed with seven seals.

Revelation 6:3

When he opened the second seal, I heard the second living creature say, "Come!"

Revelation 6:5

When he opened the third seal, I heard the third living creature say, "Come." And I looked, and behold, a black horse; and its rider had a pair of scales in his hand.

Revelation 6:7

When the Lamb opened the fourth seal, I heard the voice of the fourth living creature say, "Come!"

Revelation 6:9

When he opened the fifth seal, I saw under the altar the souls of those who had been slain because of the word of God and the testimony they had maintained;

Revelation 6:12

I looked when he opened the sixth seal, and there was a great earthquake; and the sun became black as sackcloth made of hair, and the whole moon became like blood;

Revelation 5:9

And they sang a new song, saying, "Worthy are you to take the scroll and to open its seals; for you were slain, and with your blood purchased men for God from 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
I saw in the right hand of him who sat on the throne a scroll written inside and on the back, sealed with seven seals.
Revelation 6:1
Then I saw when the Lamb opened one of the seven seals. And I heard one of the four living creatures say, as with a voice of thunder, "Come!"