Why did he ask to seek Hashem on behalf of himself?
Refer to 34:19:1:1,2.
Why does it say "Nitechah"?
'Rashi': Because Chemah (anger) is fire, an expression of melting is appropriate. It says below (verse 25) "v'Sitach Chamasi? v'Lo Sichbeh."
Here it says "k'Chol ha'Kasuv Al ha'Sefer ha'Zeh." Why does it say in Melachim II, 22:13 "k'Chol ha'Kasuv Aleinu"?
Malbim (Melachim II, 22:13) #1 The Torah, which is written on a parchment with ink, is written also on the tablet of the heart and Nefesh. This is like I wrote about "bi'Megilas Sefer Kasuv Alai" (Tehilim 40:8. One's intellect and emotions obligate him.)
Malbim (Melachim II, 22:13) #2: "K'Chol ha'Kasuv" refers to Hashem's anger. It is ignited against us in the curses in Ki Savo, because we did not heed this Sefer.
