Rashi
Jewish
1040–1105
“Behold for peace, it is bitter for me, yea it is bitter When I was notified of the tidings of peace, even that was bitter for me, for my recovery was dependent upon the merit of others (v. 5): “So has the Lord God of your father David said...”; (supra 37:35) “For My sake and for the sake of David your father.” Here You let me know that I am a sinner (See Ber. 10b). (So did the Sages explain it, but in order to reconcile the verse, it appears to mean: Behold for peace, it was bitter for me, yea it was bitter - When I was given the news by You that You would save me from the hand of Sennacherib, it was bitter for me, yea it was bitter because of my illness, that I was close to death, and I did not rejoice with the news.) But You desired my soul, that it descend not to the grave.”