John Gill Commentary Ezekiel 30:21

"Son of man, I have broken the arm of Pharaoh king of Egypt; and, lo, it hath not been bound up, to apply [healing] medicines, to put a bandage to bind it, that it be strong to hold the sword." — Ezekiel 30:21 (ASV)

Son of man, I have broken the arm of Pharaoh king of Egypt ,
&c.] Not Pharaohnecho, king of Egypt, whose army was overthrown at Carchemish by the king of Babylon, in the fourth year of Jehoiakim; when the latter took from the former all that belonged to him between the river of Egypt and the river Euphrates; by which he was so weakened and disspirited, that he could not stir any more out of his own land, (Jeremiah 46:2) (2 Kings 24:7) and of him Jarchi and Kimchi interpret it; but Pharaohhophra, or Apries, who was defeated by the Cyreneans, and saved himself by flight; (See Gill on Ezekiel 29:4): and, lo, it shall not be bound up to be healed, to put a roller to bind
it ;
a metaphor taken from surgeons, who, having set broken bones, put on a bandage or rollers of linen, or such material, to keep them tight; but nothing of this kind should be done; hereby suggesting that Egypt should receive such a blow or wound as would be incurable; see (Jeremiah 46:11) : to make it strong to hold the sword ;
which it should not be able to do, or to make war any more, at least with success, or to defend itself.