Daniel 3:23

New English Translation

²³But those three men, Shadrach, Meshach, and Abednego, fell into the furnace^[a] of blazing fire while still securely bound.^[b]

Daniel 3:23 tn Aram “into the midst of the furnace.” For stylistic reasons the words “the midst of” have been left untranslated.
Daniel 3:23 sn The deuterocanonical writings known as The Prayer of Azariah and The Song of the Three present at this point a confession and petition for God’s forgiveness and a celebration of God’s grace for the three Jewish youths in the fiery furnace. Though not found in the Hebrew/Aramaic text of Daniel, these compositions do appear in the ancient Greek versions.

New English Translation (NET)