Then said Elijah to the people, I even I only, remain a prophet of the LORD; but Baal's prophet's are four hundred and fifty men.

And he reared up an altar for Baal in the house of Baal, which he built in Samaria.

And they took the bullock which had been given them, and sacrificed it, and called on the name of Baal from morning until noon, saying, O Baal, answer us! But there was no voice, and none answered. And they leaped about the altar that had been made.

And as if it had been a light thing for him to walk in the sins of Jeroboam the son of Nebat, he also took Jezebel, the daughter of Eth-baal king of the Sidonians, for a wife. And he went and served Baal, and worshiped him.

And now send, gather to me all Israel to mount Carmel, and the prophets of Baal four hundred and fifty, and the prophets of the Asherah four hundred, who eat at Jezebel's table.

And he said, "It is not I that trouble Israel, but thou and thy father's house, in that ye have forsaken the commandments of the LORD, and hast followed Baal.

Then Elijah said to them, “Seize the prophets of Baal; do not let one of them escape.” They seized them; and Elijah brought them down to the brook Kishon, and [as God’s law required] killed them there.

Then Elijah drew near to all the people, and said, How long do ye halt between two opinions? if Jehovah be God, follow him; and if Baal, follow him. And the people answered him not a word.

And Elijah said to the prophets of Baal, Choose one bullock for yourselves, and sacrifice it first; for ye are the many; and call on the name of your god, but put no fire.

Yet will I leave seven thousand in Israel, all the knees which have not bowed to Baal, and every mouth which has not kissed him."

He served Baal, and worshiped him, and provoked to anger Yahweh, the God of Israel, according to all that his father had done.

So the prophets of Baal cried even louder and slashed themselves with swords and lances until their blood gushed out all over them, as was their custom.

Ahab complained to Jezebel about everything that Elijah had done, especially the part about him killing all the prophets of Baal with a sword.