John Gill Commentary Ezekiel 30:25

"And I will hold up the arms of the king of Babylon; and the arms of Pharaoh shall fall down; and they shall know that I am Jehovah, when I shall put my sword into the hand of the king of Babylon, and he shall stretch it out upon the land of Egypt." — Ezekiel 30:25 (ASV)

But I will strengthen the arms of the king of Babylon. Which is repeated for the sake of confirmation.

And the arms of Pharaoh shall fall down, as when a man's arms are broken; and he shall not be able to lift them up and defend himself.

And they shall know that I am the Lord; namely, the Egyptians, as in (Ezekiel 30:19).

When I shall have put my sword into the hand of the king of Babylon, and he shall stretch it out on the land of Egypt; that is, when he shall have a commission to carry the war into Egypt; and he shall spread desolation over all the land, cutting off the inhabitants of it everywhere, as before described in this chapter.