Jeremiah 28:17

“So Hananiah the prophet died the same year, etc.] That he had delivered out his prophecy; in the same year in which Jeremiah said he should die; which proved him to be a false prophet, and Jeremiah to be a true one: in the seventh month: it was two months after he had prophesied; for it was in the fifth month that he prophesied, and in the seventh he died; not after seven months, as Theodoret remarks, but in two months; so he that prophesied, that within two years what he foretold would come to pass, in two months time dies himself, according to the word of the Lord, and his prophecies die with him. The Jewish writers move a difficulty here, how he should be said to die the same year, when…”

“Died - Within two months after Jeremiah had thus prophesied; so dangerous a thing it is for ministers to teach people contrary to the revealed will of God. Next: Jeremiah Chapter 29”

“Hananiah: Isa 44:25, Isa 44:26; Zac 1:6 the seventh month: The prophecy was delivered in the fifth month ( Jer 29:1), and Hananiah died in the seventh month; exactly two months after he had delivered his false prophecy, which he declared, in the name of God, would be fulfilled in two years. Here then the true prophet was demonstrated, and the false prophet detected. The death of Hananiah, thus predicted, was God's seal to the words of His prophet, and must have gained his other predictions great credit among the people; though it is evident that it did not induce them to forsake their sins and return to the God of Israel. Next: Jeremiah Chapter 29”