1)
Why did he say "Chadal Na"? Above, he said "Slach Na" (2)!
1.
Radak (4): This is like "Slach Na." If He pardons, He will refrain from harming them.
2.
Malbim: Now he could not say "Slach Na", for the fourth time, [Shamayim] does not pardon. Even so, he requested to cease punishing, lest Yakov not be able to rise.
