2 Kings 10:15-17

15And he departed thence, and found Jehonadab the son of Rechab [coming] to meet him; and he greeted him, and said to him, Is thy heart right, as my heart is with thy heart? And Jehonadab said, It is. — If it be, give [me] thy hand. — And he gave [him] his hand; and [Jehu] took him up to him into the chariot,

16and said, Come with me, and see my zeal for Jehovah. So they made him ride in his chariot.

17And he came to Samaria, and smote all that remained to Ahab in Samaria, until he had destroyed him, according to the word of Jehovah which he spoke to Elijah.