Melachim Alef 21:26-28

Orthodox Jewish Bible

²⁶ And he acted monstrously in going after gillulim (idols), according to all things as did HaEmori, whom Hashem drove out before the Bnei Yisroel.

²⁷ And it came to pass, when Ach’av heard those words, that he tore his begadim, put sackcloth upon his basar, did a tzom, lay in sackcloth, and walked about subdued.

²⁸ And the Devar Hashem came to Eliyahu the Tishbi, saying,