1)
What is the meaning of "va'Yhi Davar Shmuel l'Chol Yisrael"?
1.
Rashi: What was said to Shmuel (a matter that will make everyone's ears ring) came to Yisrael. How did the punishment come? Yisrael went to meet Pelishtim
1
The first time, they decided to fight. Hashem said only that Yehudah should be first! Radak refers to the second time they asked (Shoftim 20:23); Hashem told them to fight. (PF)
2)
It was called "ha'Even ha'Ozer" only later (7:12)!
1.
Rashi: It is called so here based on the future.
3)
Why does the prefix Hei appear in both words "ha'Even ha'Ozer"?
1.
Radak: We find like this - "ha'Aron ha'Bris" (Yehoshua 3:14).