'Mystery' in the Bible

and [told them] to seek mercy {from the God of heaven} concerning this mystery, so that Daniel and his companions, along with the remainder of the wise men of Babylon, would not be killed.

Then in a vision of the night the mystery was revealed to Daniel; then Daniel blessed the God of heaven.

Daniel answered the king and said, "The mystery that the king asks, no wise men, conjurers, magicians, [or] diviners are able to make known to the king.

And as for me, [it is] not because of wisdom that is in me more than {any other living person} [that] this mystery is revealed to me, but {in order that} the explanation may be made known to the king and you will {understand} the thoughts of your {mind}.

The king answered Daniel and said, "{Truly} your God [is] the God of gods and the Lord of kings, and he reveals mysteries, for you are able to reveal this mystery."

" ' Belteshazzar, chief of the magicians, I myself know that [the] spirit of [the] holy gods [is] in you, and {no mystery is too difficult} for you. [Now] tell [me] [the] visions of my dream that I saw, and its explanation.