שופטים - מבחן אמינות

I will raise up for them from among their own people a prophet like yourself, in whose mouth I will put My words and who will speak to them all that I command; and anybody who fails to heed the words [the prophet] speaks in My name, I Myself will call to account. But any prophet who presumes to speak in My name an oracle that I did not command to be uttered, or who speaks in the name of other gods—that prophet shall die.” And should you ask yourselves, “How can we know that the oracle was not spoken by יהוה?”—

וכי תאמר בלבבך AND IF THOU SAY IN THINE HEART [HOW SHALL WE KNOW THE WORD WHICH THE LORD HATH NOT SPOKEN]? — you will once ask this — when Hananiah the son of Azur (the false prophet) comes and prophesies (Jeremiah 27:16) “Behold, the vessels of the Lord’s house will now shortly be brought again from Babylon”, whilst Jeremiah (the true prophet) stands and proclaims (Jeremiah 27:19—22) “concerning the pillars, and concerning the laver, and concerning the bases, and concerning the residue of the vessels [which remain in this city which Nebuchadnezzar king of Babylon took not,…]” which did not go into exile to Babylon with Jeconiah, king of Judah, “they shall be carried to Babylon [and there they shall remain]” together with Zedekiah when he will go into exile (Sifrei Devarim 178:2).

לא תגור ממנו THOU SHALT NOT BE AFRAID OF HIM — i.e. do not refrain from advocating his guilt (Sifrei Devarim 178:3) and do not fear that you may incur punishment on his account (because you have contributed to his death).