And when he departed from there, he met Jehonadab the son of Rechab 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, give me your hand.” So he gave him his hand. And Jehu took him up with him into the chariot.
Jehu, pushing on his work, is here, I. Courting the friendship of a good man, Jehonadab the son of Rechab, Kg2 10:15, Kg2 10:16. This Jehonadab, though mortified to the world and meddling little with the business of it (as appears by his charge to his posterity, which they religiously observed 300 years after, not to drink wine nor dwell in cities, Jer 35:6, etc.)...
Commenting on 2 Kings 10:15-28
And when he was departed thence,.... From Betheked, or the shearing house: he lighted on Jehonadab the son of Rechab coming to meet him; a Kenite, a descendant of Jethro, the father-in-law of Moses, a wise and good man, as appears by the laws and rules he gave to his posterity, who continued to the times of Jeremiah, and were then observant of them, Jer...
Jehonadab the son of Rechab--(See Ch1 2:55). A person who, from his piety and simple primitive manner of life (Jer. 35:1-19), was highly esteemed, and possessed great influence in the country. Jehu saw in a moment the advantage that his cause would gain from the friendship and countenance of this venerable man in the eyes of the people, and accordingly paid him the distinguished attention...