Matthew Henry Presbyterian @wholebiblehenry

It was strange that Shadrach, Meshach, and Abednego, would be present at this assembly, when, it is likely, they knew for what intent it was called together. Daniel, we may suppose, was absent, either his business calling him away or having leave from the king to withdraw, unless we suppose that he stood so high in the king's favour that none durst complain of him for his noncompliance.

Commenting on Daniel 3:8-18

John Gill Reformed Baptist @doctorgill

And whoso falleth not down and worshippeth,.... The image; the above is the decree, this that follows the sanction of it: that he should be cast into the midst of the burning fiery furnace; See Gill on Dan 3:6.

Keil & Delitzsch Lutheran @keilanddelitzsch

Dan 3:8-12 The Chaldeans immediately denounced Daniel’s three friends as transgressors of the king’s command. דּנה כּל־קבל, therefore, viz., because the friends of Daniel who were placed over the province of Babylon had not, by falling down before the golden image, done it homage. That they did not do so is not expressly said, but is expressed in what follows.

Commenting on Daniel 3:8-12