II Kings 9:1-10 NKJV
And Elisha the prophet called one of the sons of the prophets, and said to him, “Get yourself ready, take this flask of oil in your hand, and go to Ramoth Gilead. Now when you arrive at that place, look there for Jehu the son of Jehoshaphat, the son of Nimshi, and go in and make him rise up from among his associates, and take him to an inner room. Then take the flask of oil, and pour it on his head, and say, ‘Thus says the LORD: “I have anointed you king over Israel.” ’ Then open the door and flee, and do not delay.”
So the young man, the servant of the prophet, went to Ramoth Gilead. And when he arrived, there were the captains of the army sitting; and he said, “I have a message for you, Commander.”
Jehu said, “For which one of us?”
And he said, “For you, Commander.” Then he arose and went into the house. And he poured the oil on his head, and said to him, “Thus says the LORD God of Israel: ‘I have anointed you king over the people of the LORD, over Israel. You shall strike down the house of Ahab your master, 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 whole house of Ahab shall perish; and I will cut off from Ahab all the males in Israel, both bond and free. So I will make the house of Ahab like the house of Jeroboam the son of Nebat, and like the house of Baasha the son of Ahijah. The dogs shall eat Jezebel on the plot of ground at Jezreel, and there shall be none to bury her.’ ” And he opened the door and fled.
NKJV: New King James Version