'Seal Up' in the Bible

Son of man, take up a lamentation over the king of Tyre, and tell him, Thus says the Lord Yahweh: You seal up the sum, full of wisdom, and perfect in beauty.

The vision of the evenings and mornings which has been told is true: but seal up the vision; for it belongs to many days [to come].

Seventy weeks are decreed on your people and on your holy city, to finish disobedience, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up vision and prophecy, and to anoint the most holy.

When the seven thunders sounded, I was about to write; but I heard a voice from the sky saying, "Seal up the things which the seven thunders said, and don't write them."

He said to me, "Don't seal up the words of the prophecy of this book, for the time is at hand.