1)
Who said this?
1.
Rashi: Nechemyah said [that the enemy says so].
2)
What is the meaning of "Lo Yede'u v'Lo Yir'u?"?
1.
Rashi: The enemy said, Yisrael will not know when we will come suddenly upon them and kill them. Via this, we will cease the building!
2.
Malbim: They will not know when we will attack, for we will guard the secret, and they will not see beforehand, for we will come from a hidden place.
