Jehonadab (compare the margin) belonged to the tribe of the Kenites, one of the most ancient in Palestine Genesis 15:19. Their origin is unknown, but their habits were certainly those of Arahs. Owing to their connection with Moses (Numbers 24:21 note), they formed a friendship with the Israelites, accompanied them in their wanderings, and finally receivcd a location in the wilderness of Judah Judges 1:16. The character of this chief, Jonadab, is best seen in the rule which he established for his descendants Jeremiah 35:6-7 - a rule said to be still observed at the present day. It would seem that he sympathised strongly with Jehu’s proceedings, and desired to give the countenance of his authority, such as it was, to the new reign. According to the Hebrew text, Jehu “saluted” (or blessed) Jehonadab. According to the Septuagint and Josephus, Jehonadab “saluted” (or blessed) the king. Further, the Hebrew text runs - “And Jehonadab answered, It is, it is. Give (me) thy hand. And he gave (him) his hand, and took him up to him into the chariot.” Our translators appear to have preferred the Septuagint; but the Hebrew is more graphic. Jehu was no doubt glad to have the countenance of Jehonadab on his public entrance into Samaria. The ascetic had a reputation for sanctity, which could not fail to make his companionship an advantage to the but half-established monarch.
Related Commentaries of 2 Kings 10:15
2 Kings 10:15
15 And when he was departed thence, he lighted on Jehonadab the son of Rechab coming to meet him: and he saluted him, and said to him, Is thine heart right, as my heart is with thy heart? And Jehonadab answered, It is. If it be, give me thine hand. And he gave him his hand; and he took him up to him into the chariot.