Revelation 10:4
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.
Cross-references
In Revelation 10:8, the same heavenly voice now commands John to take the little book — a direct continuation after the command to seal the thunders.
In Revelation 1:11, John is commanded to write what he sees—contrasting with the command here to seal up the thunders' words.
In Revelation 2:1, John is told to write to Ephesus—opposite of the instruction here to not write.
In Revelation 14:13, a voice from heaven commands John to write — the opposite command from the 'write not' given here.
In Revelation 19:9, John is told to write about the marriage supper — contrasting with the 'write not' command here.
In Revelation 22:10, John is told not to seal the prophecy — the opposite of the 'seal up' command here regarding the thunders.
Isaiah 8:16 commands binding up the testimony and sealing it among disciples — a direct parallel to sealing the thunders.
Isaiah 29:11 describes a sealed book vision that cannot be read — mirrors the sealing of the thunders' message.
Daniel 8:26 commands sealing the vision because it refers to distant future — same reason for sealing the thunders.
Daniel 12:4 commands shutting up and sealing the book until the end — mirrors the sealing of the thunders.
Daniel 12:9 says the words are shut up and sealed until the time of the end — same idea as the thunders sealed.
In Habakkuk 2:2, God commands writing the vision plainly — opposite of the command here to seal and not write.
Habakkuk 2:3 says the vision awaits its appointed time — similar to why the thunders are sealed for later revelation.
Deuteronomy 29:29 distinguishes secret things belonging to God — the sealed thunders here are such secret things.