"Sa Na Chatasi". Why did Par'oh ask Moshe for forgiveness ? it is not Moshe who pardons but Hashem?
Ramban and R. Bachye: It was a sign of the deep respect that he 1 had for Moshe, 2 whom he perceived as a god. 3 Indeed, he concludes by asking Moshe and Aharon (in deference to Aharon) 4 to Daven to Hashem for forgiveness.
Ramban: As well as the whole of Egypt had - see 11:3.
Oznayim la'Torah ? who explains the Ramban's Kashya as 'Why Par'oh said "Sa Na Chatasi (singular), and not 'Se'u ? ': He nevertheless realized his mistake and ended in the plural, "Veha'atiru el Hashem."
See however previous Pasuk, where he placed Moshe and Aharon on a par with Hashem. See also Ramban.
Since Par'oh knew - from the erlier Makos that Moshe was the one who Davened to Hashem. See Ramban and R. Bachye.
"Veyaser me'Alai Rak es ha'Maves ha'Zeh". What are the implications of the word "Rak"?
R. Bachye: On a number of occasions Par'oh had asked Moshe to remove the Makah and gone on to harden his heart. What h therefore meant was tht he would not ask Moshe to daven for him any more ? just this once.
Why did Par'oh refer specifically to the plague of locusts as "ha'Maves ha'Zeh"?
R. Bachye #1 and Moshav Zekenim: This teaches us that people died by the plague of Arbeh just as they did by that of Barad ? Perhaps the locusts blinded them ? (in the same way as the hornet shot poison into the eyes of the Cana'anim in the time of Yehoshus ? R. Bachye).
R. Bachye #2: Because the locusts were consuming all the vegetation that the hail left intact, and the Egyptians were bound to starve.
Refer to 10:16:1:2* and 10:16:1:5.
Maharal (Gevuros Hashem Ch. 33, p. 126): These last three Makos were more severe than the prior seven; they were all tantamount to death. Refer to 10:7:0.1:1; and to 7:14:7:2 and its notes. 1