Daniel 3:24 (BSB)

Suddenly King Nebuchadnezzar jumped up in amazement and asked his advisers, “Did we not throw three men, firmly bound, into the fire?” “Certainly, O king,” they replied.

From Daniel 3. Also in the ESV.

Commentary on Daniel 3:24

• John Calvin (Reformed), Calvin's Commentaries on Daniel 3:24: Here Daniel relates how God’s power was manifest to the profane — to both the king and his courtiers, who had conspired for the death of these holy men. He says, then, the king trembled at that miracle; since God often compels the impious to acknowledge his power, and when they stupidity themselves, and harden all their senses, they are compelled to feel God’s power whether they will or not.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 3:19-27: In these verses we have, I. The casting of these three faithful servants of God into the fiery furnace. Nebuchadnezzar had himself known and owned so much of the true God that, one would have thought, though his pride and vanity induced him to make this golden image, and set it up to be worshipped, yet what these young men now said (whom he had...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 3:24: He answered and said, lo, I see four men loose,.... Not bound as the three were, when cast in; but quite at liberty in their hands and feet, and separate from one another. As this fiery furnace may be an emblem of the fiery trials and afflictive dispensations the children of God pass through in this world, being not joyous, but grievous to the flesh...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 3:24: True, O king--God extorted this confession from His enemies' own mouths.