What matters did all of Yisrael transgress?
Malbim: They rebelled, and did not heed Your voice via the Nevi'im.
What is the meaning of "va'Titach Aleinu"?
Rashi: You brought to us. This is like "Lo Nitach Artzah"; Targum Onkelos is Lo Mata l'Ara.
Ibn Ezra: This is melting, like "Tutechu v'Sochah."
Malbim: The Tochachah in Vayikra is in the future ? "Im b'Chukosai Tim'asu? Lo Sishme'u Li?" It is to make Yisrael repent. He brings the afflictions one by one ? "v'Yasafti Leyasrah" "Af Ani E'eseh." The curses in Devarim are a punishment for the past. After He brought the previous curses, and they did not want to repent, He will bring the latter Tochachah to cleanse them. These will come at once, like one who pours something at once.
What curse and Shevu'ah are in the Torah?
Rashi: Alos ha'Bris that were put on us with a Shevu'ah at Chorev ? "v'Hayah Im Lo Sishme'u?" ? all the curses written there.
Malbim: This refers to the curses in Devarim, which came with an Alah and Shevu'ah.
