Revelation 10:4

And when the seven thunders spoke [words], I started to write down [what the voices said], but I heard a voice from heaven saying, "Seal up what the seven thunders have [just] said, and do not write them down."

Revelation 1:11

saying, "Write down in a book what you see and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicia" [Note: These seven congregations were all located in western Asia Minor].

Revelation 22:10

Then the angel said to me, "Do not seal up the words of the prophecy of this book, for the time is near [i.e., for the events of its prophecies to begin to happen].

Revelation 2:1-3

"Write [this] to the angel [i.e., the messenger] of the church at Ephesus [Note: These "messengers," (verses 8, 12, 18; 3:1, 7, 14) are thought by some to be evangelists]: These things are the words of the One who holds the seven stars in His right hand and walks among the seven golden lampstands:

Treasury of Scripture Knowledge

Summary

And when the seven thunders had uttered their voices, I was about to write: and I heard a voice from heaven saying unto me, Seal up those things which the seven thunders uttered, and write them not.

Bible References

I was

Revelation 1:11
saying, "Write down in a book what you see and send it to the seven churches: Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicia" [Note: These seven congregations were all located in western Asia Minor].