Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

דּי מן (because that), a further explanatory expression added to דּנה כּל־קבל (wholly for this cause): because the word of the king was sharp, and in consequence of it (ו), the furnace was heated beyond measure for that reason. The words אלּך גּבריּא (these mighty men) stand here in the status absol., and are again taken up in the pronoun המּון after the verb קטּל. If the three were brought up to the furnace, it must have had a mouth above, through which the victims could be cast into it. When heated to an ordinary degree, this could be done without danger to the men who performed this service; but in the present case the heat of the fire was so great, that the servants themselves perished by it. This circumstance also is mentioned to show the greatness of the miracle by which the three were preserved unhurt in the midst of the furnace. The same thing is intended by the repetition of the word מכפּתין, bound, Dan 3:23, which, moreover, is purposely placed at the close of the passage to prepare for the contrast שׁרין, at liberty, free from the bonds, Dan 3:25. (Note: Between Dan 3:23 and Dan 3:24 the lxx have introduced the Prayer of Azariah and the Song of the three men in the fiery furnace; and these two hymns are connected together by a narrative which explains the death of the Chaldeans who threw the three into the furnace, and the miracle of the deliverance of Daniel's friends. Regarding the apocryphal origin of these additions, composed in the Greek language, which Luther in his translation has rightly placed in the Apocrypha, see my Lehr. der Einl. in d. A. Test. 251.)