2 Kings 10:10, 11, 31

Know, then, that not a word the LORD has spoken against the house of Ahab will fail. The LORD has done what he announced through his servant Elijah.”

So Jehu killed everyone in Jezreel who remained of the house of Ahab, as well as all his chief men, his close friends and his priests, leaving him no survivor.

Yet Jehu was not careful to keep the law of the LORD, the God of Israel, with all his heart. He did not turn away from the sins of Jeroboam, which he had caused Israel to commit.