1)
Will Hashem break both arms? One was already broken!
1.
Rashi: I will break the second, and then both will be broken. I.e. Melech Bavel already took from one side - I will hand over to him the entire kingdom. Radak - the strong arm is a Mashal for what remained of Egypt's land after Nebuchadnetzar struck him by the Pras river.
2.
Malbim: Also the broken arm was broken a second time in the days of Tzidkiyah.
