Revelation 10:3

and he cried in a loud voice like the roaring of a lion. At his cry the seven peals of thunder spoke, each with its own voice.

Revelation 4:5

Out from the throne 'come flashes of lightning, cries, and peals of thunder'! There are seven torches burning in front of the throne, which are the seven spirits of God;

Revelation 8:5

Then the angel took the censer, and filled it with fire from the altar, and threw it down upon the earth; and there followed 'peals of thunder, cries, flashes of lightning,' and an earthquake.

Revelation 14:2

And I heard a sound from Heaven, 'like the sound of many waters,' and like the sound of a loud peal of thunder; the sound that I heard was like the music of harpers playing on their harps.

Revelation 15:1

Then I saw another portent in the heavens--a great and marvelous portent--seven angels with the seven last Curses; because with them the Wrath of God is ended.

Revelation 15:7

One of the four Creatures gave the seven angels seven golden bowls, filled with the Wrath of God who lives for ever and ever.

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
Then the angel took the censer, and filled it with fire from the altar, and threw it down upon the earth; and there followed 'peals of thunder, cries, flashes of lightning,' and an earthquake.
Revelation 14:2
And I heard a sound from Heaven, 'like the sound of many waters,' and like the sound of a loud peal of thunder; the sound that I heard was like the music of harpers playing on their harps.
Revelation 15:1
Then I saw another portent in the heavens--a great and marvelous portent--seven angels with the seven last Curses; because with them the Wrath of God is ended.