Midrash sa 2 Samuel 13:33: Otzar Midrashim

"For rather Amnon" (II Samuel 13:33) is written, because at first Jonadab son of Shim'ah said "for Amnon alone has died," for the truth of the matter that Amnon alone had died was not known to him, so when he thought it in his heart he said, "Let not milord the king put the thought in his head that all the king's sons have died, rather Amnon alone is dead," for he was heading the truth of the matter. And the scripture is lacking a word because of the ignominity of his actions and the unnaturalness of his death, so the word "rather" is written and not read.