1)
What is the meaning of "la'Mo'ed Asher Shmuel"?
1.
Rashi: The verse is abbreviated; it is as if it says Asher Sam Shmuel (that Shmuel set). Or, it is like la'Mo'ed Asher li'Shmuel. This is like "Shnei Anashim? Hayu Ven Sha'ul" (Shmuel 2 4:2), which like l'Ven Sha'ul. Shmuel had told Sha'ul to wait seven days for him (10:8).
2.
Radak citing Targum Yonasan: The verse is abbreviated; it is as if it says Asher Amar Shmuel.
3.
Malbim: It is as if it says Asher Yavo Shmuel.
2)
What is the meaning of "va'Yafetz ha'Am me'Alav"?
1.
Radak: This is Po'el Omed (the action applies to the subject himself; the people scattered), like "va'Yafetz ha'Am b'Chol Eretz Mitzrayim" (Shemos 5:12).
