1 Kings 18:17

And it came to pass when Ahab saw Elijah
As soon as he came up to him, and knew who he was; Abarbinel thinks, because his hair was grown so long that Ahab did not know him certainly, and therefore put the following question:

that Ahab said unto him, art thou he that troubleth Israel?
by opposing the religion of Baal, which prevailed among them; but chiefly rain being withheld from them according to his word, and at his prayer.