A letter from Tito was found among Stalin’s papers after Stalin’s death, saying:
Stalin. Stop sending assassins to murder me. We have already caught five, one with a bomb, another with a rifle… If this doesn’t stop, we will send one man to Moscow and there will be no need for another one.
Khrushchev recalls that Stalin once boasted: “”I will shake my little finger — and there will be no more Tito. He will fall.“. . . But this did not happen to Tito. No matter how much or how little Stalin shook, not only his little finger but everything else that he could shake =)), Tito did not fall.”
(From Archie Brown’s The Rise and Fall of Communism)