2KI 10:15

15 Then Jehu [continued to travel toward Samaria]. Along the road, he was met by Jonadab, a leader of the Rechab clan. Jehu greeted him and said to him, “Are you as devoted to me [IDM] as I am devoted to you?” Jonadab replied, “Yes, I am.” Jehu said, “If you are, shake hands with me.” So Jonadab shook hands with him, and Jehu helped him to get into his chariot.