Daniel 6:16

Darius’ parting words to Daniel are significant. One could render them, "Your God whom you serve continually, He will deliver you." [Note: Franz Rosenthal, A Grammar of Biblical Aramaic, pp. 54-55.] The idea is that Darius had tried to save Daniel and had failed. Now Yahweh must save him. We do not know, of course, if Darius knew about Yahweh’s deliverance of Daniel’s three friends. Again, we see that God did not preserve His servant from difficulty, but brought him though it safely-His normal way of dealing with His own.

"Observable in this assurance of Darius is the deep impression that Daniel’s personal piety and faithfulness to God had made upon the king and that this impression had brought about Darius’ own conviction that Daniel’s God would come to his rescue in Daniel’s extremity." [Note: Walvoord, p. 140.]