Daniel 3:27 (BSB)

and when the satraps, prefects, governors, and royal advisers had gathered around, they saw that the fire had no effect on the bodies of these men. Not a hair of their heads was singed, their robes were unaffected, and there was no smell of fire on them.

From Daniel 3. Also in the ESV.

Commentary on Daniel 3:27

• John Calvin (Reformed), Calvin's Commentaries on Daniel 3:27: Daniel relates how the satraps were gathered together with the leaders, prefects, and councilors of the king. The gathering was simply a collection of numbers, and if they deliberated about anything of importance, they all agreed. And this confirms the miracle, since if they had been stupefied, how could the great power of God be proposed to the eyes of the blind?
• 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 3:27: Then Nebuchadnezzar spake and said,.... In the presence of his princes and prime ministers of state, and made the following confession, to the praise and glory of the true God; which was extorted from him at this time through the force of conviction; for it does not appear to be a thorough conversion; nor did he relinquish his gods, and the worship of them: blessed...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 3:27: nor . . . an hair-- (Luk 12:7; Luk 21:18). fire had no power--fulfilling Isa 43:2; compare Heb 11:34. God alone is a "consuming fire" (Heb 12:29). nor . . . smell of fire--compare spiritually, Th1 5:22.