2 Kings 10:16-20

Then he said, “Come with me and see my zeal for the Lord.” So he had him ride in his chariot.

When he came to Samaria, he killed all who remained to Ahab in Samaria, until he had eliminated them, in accordance with the word of the Lord which He spoke to Elijah. Jehu Destroys Baal Worshipers

Then Jehu gathered all the people and said to them, “Ahab served Baal a little; Jehu will serve him much.

Now, summon to me all the prophets of Baal, all his worshipers and all his priests; let no one go missing, because I have a great sacrifice for Baal; whoever is missing shall not live.” But Jehu did it in deception, in order to eliminate the worshipers of Baal.

And Jehu said, “Proclaim a holy assembly for Baal.” And they proclaimed it.