'Seal Up' in the Bible

And when the seven thunders had spoken, I was about to write: and I heard a voice from heaven, saying, Seal up what the seven thunders have spoken, and write it not.

and he cast him into the abyss, and shut him down, and set a seal upon him, that he might not deceive the nations any more, till the thousand years were accomplished; and then he must be loosed again for a little time.