What is the meaning of "Kadeshu"?
Rashi: Prepare. Radak - even though each grazed in his place, they called to each other to make war against Tziyon.
Why do they say "Oy Lanu Ki Fanah ha'Yom"?
Rashi (from Ta'anis 29a): At the time that the day was ending, they set the Mikdash on fire.
Radak: Our enemies say in the afternoon for our evil. It is harsh due to the heat, and a good time due to the light. We get only the bad - the day became dark for us. I.e. the light departed and the shadows are leaning and spreading. We have no light, only darkness.
Malbim: The enemy said to each other, alas that we did not attack earlier in the afternoon, when it was sunny, and she would not go out. Now it is late in the day. There is shade, and she can go out!
