Musar su I Re 18:22

And our Rabbis, may their memory be blessed, said about the matter of talebearing (Niddah 61a) [that] even though it is forbidden to accept it and hate one’s fellow as a result, yet one should not belittle the matter. Rather he should guard himself and be concerned about the matter. They, may their memory be blessed, said (Yerushalmi Peah 1:1) [that] the generation of Saul had informers like Doeg and the Ziphites. And as a result, they went to war and fell. [But] the generation of Ahab did not have informers - as you know from the matter of the prophets that hid from Jezebel, as it is written (I Kings 18:22), “I am the only prophet of the Lord left.” Yet Obadiah hid a hundred prophets, but no one revealed that there was a prophet besides Elijah. And as a result of this, they would go to war and be victorious - even though Ahab worshipped idolatry.

And thus have we found in Midrash Shocher Tov and in Yerushalmi Peah 1:1, that in the days of Achav, even though they served idols, they were victorious in war because there was no lashon hara among them. The proof: They did not slander Ovadiah [to Achav] for hiding a hundred prophets in two caves, and no man of them revealed that there was a prophet in Israel aside from Eliyahu, as it is written (I Malachi 18:22): "I alone have been left as a prophet to the L-rd" — even though everyone knew of it. For they would give Ovadiah bread and water to Ovadiah to feed them with. And in the end of the days of Saul, there was slander among them as with Doeg and the Zifim. But there was no idolatry among them as there was in the days of Achav. And there were young children among them who were conversant in forty-nine facets of Torah, [and yet] they went to war and were defeated.