Charles Ellicott 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)

I have broken.— This is in the perfect tense, and refers to the breaking of the power of Egypt by the former conquests of Assyria, and perhaps especially to the great battle of Carchemish (about twenty years before), in which Egypt received a blow from which she never recovered. The word “roller” would be better understood now if translated bandage.