Why does it say "Ki He'elisicha?"?
Rashi: Even though I did all this good for you, I did not weary you with great Avodah and great Korbanos. Malbim (5) ? Sefer Devarim does not elaborate about Korbanos 1 .
Radak: I did good for you ? I raised you from Egypt, where you had harsh labor!
Malbim: I raised you from Egypt before the time 2 . Even though you were in Beis Avadim, I redeemed you.
How is this a support? The Ramban (introduction to Sefer Devarim) says that it does not repeat Ma'ase ha'Korbanos and Taharas Kohanim, for they are zealous and need not be warned again. Perhaps similarly, Yisrael need not be warned again about Korbanos. Even Amei ha'Aretz were believed about Kodshim (Chagigah 3:4)! (PF)
I.e. 400 years, like He told Avraham (Bereishis 15:13). (PF)
What is "mi'Beis Avadim"?
Radak #1: From Egypt. This is like "Anochi Hashem Elokecha Asher Hotzeisicha me'Eretz Mitzrayim mi'Beis Avadim" (Shemos 20:2). It is the place where you were slaves.
Radak #2: The Egyptians were slaves, and you were slaves to slaves. Mitzrayim comes from Cham, about whom it says "Eved Avadim Yihyeh l'Echav" (Bereishis 9:25).
Why did Hashem send three to bring them out of Egypt?
Rashi citing Targum Yonasan: Moshe was to teach the tradition of laws, Aharon to atone for them, and Miryam to teach the women.
Radak: It was to inform you that the Ge'ulah came, to relieve you of your anguish.
Malbim: The manna was in the merit of Moshe (the clouds in the merit of Aharon, and the well in the merit of Miryam). Also they taught to them the good path ? Moshe taught the men, Miryam taught the women, and Aharon was Kohen to Hashem.
