Revelation 10:4

And when the seven peals of thunder had spoken, I was about to write down what they had said; but I heard a voice from Heaven which told me to keep secret all that the seven peals of thunder had said, and not write it down.

Revelation 1:11

It said, "Write forthwith in a roll an account of what you see, and send it to the seven Churches--to Ephesus, Smyrna, Pergamum, Thyateira, Sardis, Philadelphia and Laodicea."

Revelation 22:10

"Make no secret," he added, "of the meaning of the predictions contained in this book; for the time for their fulfillment is now close at hand.

Revelation 2:1-3

"To the minister of the Church in Ephesus write as follows: "'This is what He who holds the seven stars in the grasp of His right hand says--He who walks to and fro among the seven lampstands of gold.

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
It said, "Write forthwith in a roll an account of what you see, and send it to the seven Churches--to Ephesus, Smyrna, Pergamum, Thyateira, Sardis, Philadelphia and Laodicea."