Jeremiah 28:9 in the King James Version
The prophet which 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.
Context
8 The prophets who have been before me and before you of old prophesied against many countries, and against great kingdoms, of war, of evil, and of pestilence.
9 As for the prophet who prophesies of peace, when the word of the prophet happens, then the prophet will be known, that the LORD has truly sent him.”
10 Then Hananiah the prophet took the bar from off the prophet Jeremiah’s neck, and broke it.