Daniel 3:30

Then the king promoted Shadrach ... - Margin, “made to prosper.” The Chaldee means no more than “made to prosper.” Whether he restored them to their former places, or to higher honors, does not…

Then the king promoted, etc. - He restored them to the offices which they held before the charge of disobedience and treason was brought against them.

At the end of this verse the Septuagint add, "And…

The strict observations that were made, super visum corporis - on inspecting their bodies, by the princes and governors, and all the great men who were present upon this public occasion, and who could…

promoted made to prosper (cf. Dan 6:28), i.e. supported them in different ways in the discharge of their office, and so ensured their success (Dan 2:49).