'Secrets' in the Bible

but there is a God in heaven who reveals secrets, and He has shown King Nebuchadnezzar what will take place in the latter days (end of days). This was your dream and the vision [that appeared] in your mind while on your bed.

As for you, O king, as you were lying on your bed thoughts came into your mind about what will take place in the future; and He who reveals secrets has shown you what will occur.