What are the connotations of "ve'Ayavti es Oyvecha"?
Seforno: If Yisrael will obey the voice of the angel, Hashem will destroy the enemy without compassion. 1
Why does the Torah write "ve'Hich'chadtiv" in the singular?
Ramban: Because, if Yisrael will obey his voice, 1 the redeeming angel who will accompany Yisrael into battle will destroy the Cana'anim - as if they were one man.
Why does the Torah use the double expression "Im Shamo'a Tishma"?
Refer to 15:26:152:1-3.