'Seal Up' in the Bible

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

And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he might deceive the nations no more, till the thousand years should be fulfilled. After this he must be loosed for a small time.