'Unsealed' in the Bible

Then Sanballat sent his assistant to me the fifth time. But this time the letter was sent unsealed, and

There were two copies of the deed of purchase. One was sealed and contained the order of transfer and the conditions of purchase. The other was left unsealed.

The Lord God of Israel who rules over all says, "Take these documents, both the sealed copy of the deed of purchase and the unsealed copy. Put them in a clay jar so that they may be preserved for a long time to come."'

A river of fire flowed out from before him. Thousands upon thousands were serving him, with millions upon millions waiting before him. The court sat in judgment, and record books were unsealed.

O Corinthians, our lips are unsealed to you: our heart is expanded.