Daniel 3:17 (BSB)

If the God whom we serve exists, then He is able to deliver us from the blazing fiery furnace and from your hand, O king.

From Daniel 3. Also in the ESV.

Commentary on Daniel 3:17

• John Calvin (Reformed), Calvin's Commentaries on Daniel 3:17: And when they add — God is sufficiently powerful to preserve us; and if not, we are prepared for death, they point out to us what ought to raise our minds above all trials, namely, the preciousness of our life in God’s sight, since he can liberate us if he pleases.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Daniel 3:8-18: 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.
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Daniel 3:17: If it be so,.... That we must be cast into the fiery furnace, as thou hast threatened: our God whom we serve; for though they did not serve the gods of the Babylonians, they did not live without God in the world; they believed in the one true God, the God of Israel, their covenant God and Father; whom they worshipped, had an interest in...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Daniel 3:17: If it be so--VATABLUS translates, "Assuredly." English Version agrees better with the original. The sense is, If it be our lot to be cast into the furnace, our God (quoted from Deu 6:4) is able to deliver us (a reply to Nebuchadnezzar's challenge, "Who is that God that shall deliver you?"); and He will deliver us (either from death, or in death, Ti2 4:17-18).