2 Kings 9:4-8

So the young man, the servant of the prophet, went to Ramoth-gilead.

When he arrived, behold, the commanders of the army were sitting, and he said, “I have a word for you, commander.” And Jehu said, “For which one of us?” And he said, “For you, commander.”

He then got up and went into the house, and the prophet’s servant poured the oil on his head and said to him, “This is what the Lord, the God of Israel says: ‘I have anointed you king over the people of the Lord, over Israel.

And you shall strike the house of Ahab your master, so that I may avenge the blood of My servants the prophets, and the blood of all the servants of the Lord, at the hand of Jezebel.

For the entire house of Ahab shall perish, and I will eliminate from Ahab every male person both slave and free in Israel.