Daniel 3:6 (BSB)

And whoever does not fall down and worship will immediately be thrown into the blazing fiery furnace.”

From Daniel 3. Also in the ESV.

Commentary on Daniel 3:6

• John Calvin (Reformed), Calvin's Commentaries on Daniel 3:6: Respecting the required adoration, nothing but outward observance was needed. King Nebuchadnezzar did not exact a verbal profession of belief in this deity, that is, in the divinity of the statue which he commanded to be worshipped; it was quite sufficient to offer to it merely outward worship.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 3:1-7: We have no certainty concerning the date of this story, only that if this image, which Nebuchadnezzar dedicated, had any relation to that which he dreamed of, it is probable that it happened not long after that; some reckon it to be about the seventh year of Nebuchadnezzar, a year before Jehoiachin's captivity, in which Ezekiel was carried away. Observe, I. A golden image set up to be worshipped.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 3:6: And whoso falleth not down and worshippeth,.... Who refuses to worship it, or wilfully neglects it; which would be interpreted a contempt of it, and of the king's command: shall in the same hour be cast into the midst of a burning fiery furnace; such as were used to burn stones in for lime, as Jarchi observes: the music was to draw, the furnace was...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 3:6: No other nation but the Jews would feel this edict oppressive; for it did not prevent them worshipping their own gods besides. It was evidently aimed at the Jews by those jealous of their high position in the king's court, who therefore induced the king to pass an edict as to all recusants, representing such refusal of homage as an act of treason to Nebuchadnezzar...