And when he departed from there, he met 1Jehonadab the son of 2Rechab coming to meet him. And he greeted him and said to him, "Is your heart true to my heart as mine is to yours?" And Jehonadab answered, "It is." Jehu said,"If it is, 3give me your hand." So he gave him his hand. And Jehu took him up with him into the chariot.
References for 2 Kings 10:15