2 Kings 9:6-8

So Jehu left the others and went into the house. Then the young prophet poured the oil over Jehu’s head and said, “This is what the LORD, the God of Israel, says: I anoint you king over the LORD’s people, Israel. You are to destroy the family of Ahab, your master. In this way, I will avenge the murder of my prophets and all the LORD’s servants who were killed by Jezebel. The entire family of Ahab must be wiped out. I will destroy every one of his male descendants, slave and free alike, anywhere in Israel.