1)
About what did Yehonason say "Chalilah Lecha"?
1.
Rashi: Do not suspect me, that I would learn that father resolved to kill you, and hide it from you!
2.
Malbim: Surely you do not have sin!
2)
Why did he say "Im Yado'a Eda
1.
Rashi: [Heaven forbid] that I would learn [that father resolved to kill you] and not tell you!
2.
Malbim: This is said in astonishment. If I know
