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.

The prophet that prophesied peace when his word shall come to pass, the prophet shall be known, whom the Lord hath sent in truth.

The prophet that prophesieth of peace, when the word of the prophet shall come to pass, shall be known as the prophet whom Jehovah hath really sent.

The prophet who doth prophesy of peace, by the coming in of the word of the prophet, known is the prophet that Jehovah hath truly sent him.'

The prophet whose words are of peace, when his words come true, will be seen to be a prophet whom the Lord has sent.

The prophet who has predicted peace, if his word will occur, then the prophet will be known as one whom the Lord has sent in truth."

Propheta qui prophetaverit de pace (hoc est, de rebus prosperis,) cum venerit sermo (id est, cum eventu comprobatus fuerit sermo prophetae,) cognoscetur propheta quod miserit eum Jellova in veritate.

Then shall the prophet - Or, "shall be known as the prophet whom the Lord hath truly sent."

When the word of the prophet shall come to pass - Here is the criterion. He is a true prophet who specifies things that he says shall happen, and also fixes the time of the event; and the things do happen, and in that time.
You say that Nebuchadnezzar shall not overthrow this city; and that in two years from this time, not only the sacred vessels already taken away shall be restored, but also that Jeconiah and all the Jewish captives shall be restored, and the Babylonish yoke broken, see Jeremiah 28:2, Jeremiah 28:3, Jeremiah 28:4. Now I say that Nebuchadnezzar will come this year, and destroy this city, and lead away the rest of the people into captivity, and the rest of the sacred vessels; and that there will be no restoration of any kind till seventy years from this time.

The prophet which prophesieth of peace,.... Of prosperity, of good things, as Hananiah did, and which are always acceptable to men; and such a prophet is agreeable to them:
when the word of the Lord shall come to pass; when the prophecy of good things, which he delivers in the name of the Lord, shall be filled:
then shall the prophet be known that the Lord hath truly sent him; and not till then; it is the event that must make it manifest: in the other case it may be in a good measure known before it comes to pass, and, whether it comes to pass or not, that a prophet is a true prophet; because his prophecies are agreeable to the word and the declared will of God; contain evils threatened on account of sin, and in order to bring men to repentance, which must needs be right; and besides, they have no interest of their own to serve, but run contrary to the stream of the people, and are exposed to their rage and censure: whereas, a man that prophesies of peace, he is more to be suspected of flattering the people, and of prophesying out of his own heart; and nothing but the event can show him a true prophet; which if he delivers with a proviso, that the people do not do that which is evil in the sight of God, to provoke him to deny them the promised good, is always certainly fulfilled; and if it is not, then he appears manifestly a false prophet.

peace--Hananiah had given no warning as to the need of conversion, but had foretold prosperity unconditionally. Jeremiah does not say that all are true prophets who foretell truths in any instance (which Deuteronomy 13:1-2, disproves); but asserts only the converse, namely, that whoever, as Hananiah, predicts what the event does not confirm, is a false prophet. There are two tests of prophets: (1) The event, Deuteronomy 18:22. (2) The word of God, Isaiah 8:20.