The Torah in Parashat Shoftim (18:15 ) introduces the command to obey the instructions of a prophet. Once someone has been confirmed as an authentic prophet, the Torah commands, "Elav Tishma'un" – we must heed everything he tells us to do. The Rambam discusses this command in Hilchot Yesodeh Ha'Torah (9:3), and he explains that it includes an obligation to obey a prophet in the exceptional case where he instructs doing something that the Torah forbids. Even when the prophet tells the people to transgress a Torah law – we are required to comply. However, the Rambam adds, this depends on several conditions. Firstly, and most obviously, the prophet must have previously established his credentials and been recognized as an authentic prophet of G-d. Secondly, this requirement applies only if the prophet calls for a temporary suspension of a Torah command. If, the Rambam writes, a prophet announces the permanent abolition of a Torah law, then not only should he be disobeyed – he is determined to be a false prophet, and must be put to death. The final condition is that the prophet calls for suspending a Torah law other than the prohibition against idol-worship. A prophet who calls upon the people to worship a foreign deity, even as a temporary measure, must not be obeyed. The Rambam draws our attention to a classic example of a prophet who called for a temporary suspension of a Torah command – the story of Eliyahu's confrontation with the prophets of the idol Ba'al. As we read in the Book of Melachim I (chapter 18), Eliyahu assembled the people at Mount Carmel for a "showdown" with the pagan prophets. He invited the prophets of Ba'al to offer a sacrifice to Ba'al, after which he would offer a sacrifice to Hashem, so that the sacrifice which received a response would prove who the true Deity is. The prophets of Ba'al offered their sacrifice, which of course elicited no response, whereupon Eliyahu offered a sacrifice which was miraculously consumed by a fire that descended from the heavens. The people then realized the fallacy of paganism, and the truth of Hashem's existence. Now offering a sacrifice outside the Bet Ha'mikdash constitutes a grave Torah violation, punishable by "Karet." Nevertheless, the people were required to accept Eliyahu's decision to offer a sacrifice on Mount Carmel as a temporary measure necessary for the purpose of opposing the pagan prophets. Rav Meir Simha Ha'kohen of Dvinsk (1843-1926), in his Meshech Hochma (Parashat Re'eh), offers an insight into why the Rambam pointed to this specific incident as an example of a prophet calling for the suspension of a Torah law. He notes that when the Torah introduces the prohibition against offering sacrifices outside the Bet Ha'mikdash, it explains the reason for this command – so that people will not sacrifice to foreign deities ("Ve'lo Yizbehu Od Et Zivhehem La'se'iriim Asher Hem Zonim Aharehem" – Vayikra 17:7). By requiring that all sacrifices must be brought to the Bet Ha'mikdash, the Torah helps ensure that people will not offer sacrifices to false gods. It thus emerges that this prohibition – which Eliyahu temporarily suspended at Mount Carmel – is associated with the prohibition against idolatry, as it is intended as a safeguard against foreign worship. Hence, the Meshech Hochma writes, a prophet does not actually have the authority to suspend this command. As we saw earlier, a prophet must be disobeyed if he orders the people to worship foreign deities – and presumably, this should extend also to commands intended to distance the people from idol worship, such as the prohibition against sacrificing outside the Bet Ha'mikdash. Nevertheless, the Meshech Hochma explains, Eliyahu was allowed to suspend this prohibition, because he did so for the specific purpose of leading the people away from idolatry. Seeing how the worship of Ba'al had become rampant among the nation, Eliyahu realized he needed to resort to drastic measures to convince the people to worship G-d, instead – and this necessitated offering a sacrifice outside the Bet Ha'mikdash. Therefore, although a prophet may not suspend a prohibition associated with the prohibition of idolatry, this is allowed when it serves to distance the people from idolatry. The Meshech Hochma explains on this basis why the Rambam chose specifically this example of a prophet temporarily suspending a Torah law – because this is the most extreme case of a prophet's legitimate suspension of a Torah command, a situation that we would have assumed would require the people's disobedience. Specifically this story exemplifies the extent of the prophet's authority, how he must be obeyed even when he calls for the temporary suspension of a law associated with the prohibition of idolatry when he deems this necessary to lead the people away from idolatry.