Revelation 10:3

and he cried with a loud voice, as a lion roars. And when he cried the seven thunders uttered their voices.

Revelation 4:5

And from the throne lightnings and voices and thunders are going out; and seven lamps of fire are burning before the throne, which are the seven Spirits of God:

Revelation 8:5

And the angel took the censer, and filled it with the fire of the altar, and cast it to the earth: and there were thunders, and voices, and lightnings, and an earthquake.

Revelation 14:2

And I heard a voice from heaven, as the sound of many waters, and as the sound of a great thunder: and the sound which I heard was as the sound of harpers harping with their harps:

Revelation 15:1

And I saw another sign in the heaven, great and wonderful, seven angels having the seven last plagues; that in them the wrath of God is finished.

Revelation 15:7

And one of the four living creatures gave to the seven angels seven golden bowls full of the wrath of God who liveth unto the ages of the ages.

Treasury of Scripture Knowledge

Summary

And cried with a loud voice, as when a lion roareth: and when he had cried, seven thunders uttered their voices.

Bible References

Seven

Revelation 8:5
And the angel took the censer, and filled it with the fire of the altar, and cast it to the earth: and there were thunders, and voices, and lightnings, and an earthquake.
Revelation 14:2
And I heard a voice from heaven, as the sound of many waters, and as the sound of a great thunder: and the sound which I heard was as the sound of harpers harping with their harps:
Revelation 15:1
And I saw another sign in the heaven, great and wonderful, seven angels having the seven last plagues; that in them the wrath of God is finished.