What is the significance of "Vaye'tar el Hashem" (as opposed to Vayispalel el Hashem)?
Rashi: It means that Moshe (did not just Daven, but that he) Davened intensely. 1
Riva: Because Hashem gives and does not take. Moshe wanted Hashem to take back every animal
Knowing that Par'oh would retract (seeing as all ten plagues were hinted on his staff), why did Moshe immediately agree to Daven on Par'oh's behalf?
Oznayim la'Torah: Because Hashem commanded him to do so