1)
What is the meaning of "ha'Lo Atah Elokim Zenachtanu"?
1.
Malbim (60:12): This that initially You abandoned us, i.e. You did not go out with our troops, was for our benefit.
2)
What is the meaning of "v'Lo Setzei"?
1.
Rashi (60:12): You do not go out.
