Midrash su Geremia 28:9

The Holy One, blessed be He, told Jeremiah: Make thee bands and bars and put them upon thy neck (ibid. 27:2), just as, in the future, Nebuchadnezzar will bind them about the necks of My children. And he did so (on himself). However, Hananiah removed them from Jeremiah’s neck and destroyed them, as it is said: Hananiah the prophet took the bar from off the prophet Jeremiah’s neck, and broke it. And Hananiah spoke in the presence of all the people, saying: “Thus saith the Lord: Even so will I break the yoke of Nebuchadnezzar, king of Babylon” (Jer. 28: 10–11). Jeremiah, thereupon, called out to Hananiah: There have been prophets before me and you, but the prophet that prophesieth of peace, when the word of the prophet shall come to pass, then shall the prophet be known, that the Lord hath truly sent him (ibid., v. 9). I have prophesied misfortune, but if my prophecy does not come to pass, I shall not necessarily have lied, for the Holy One, blessed be He, may threaten to do evil and then retract. But you have prophesied good tidings; if your words do not come to pass, then you shall be a false prophet, for when the Holy One, blessed be He, promises to do a good deed He does not retract His promise even though men transgress against Him.