15 When Jehu left there, he met Jehonadab son of Recab, who was coming to meet him. After they had greeted each other, Jehu said to him, "Are you as loyal to me as I am to you?" "Yes, I am," Jehonadab replied. "If you are," Jehu said, "then give me your hand." So Jehonadab put out his hand, and Jehu helped him into the chariot. 16 Then Jehu said, "Now come with me, and see how devoted I am to the Lord ." So Jehonadab rode along with him. 17 When Jehu arrived in Samaria, he killed everyone who was left there from Ahab's family, just as the Lord had promised through Elijah.
18 Then Jehu called a meeting of all the people of the city and said to them, "Ahab's worship of Baal was nothing compared to the way I will worship him! 19 Therefore, summon all the prophets and worshipers of Baal, and call together all his priests. See to it that every one of them comes, for I am going to offer a great sacrifice to Baal. Anyone who fails to come will be put to death." But Jehu's cunning plan was to destroy all the worshipers of Baal. 20 Then Jehu ordered, "Prepare a solemn assembly to worship Baal!" So they did. 21 He sent messengers throughout all Israel summoning those who worshiped Baal. They all came-not a single one remained behind-and they filled the temple of Baal from one end to the other. 22 And Jehu instructed the keeper of the wardrobe, "Be sure that every worshiper of Baal wears one of these robes." So robes were given to them. 23 Then Jehu went into the temple of Baal with Jehonadab son of Recab. Jehu said to the worshipers of Baal, "Make sure no one who worships the Lord is here-only those who worship Baal."
Matthew Henry's Commentary on 2 Kings 10:15-23
Commentary on 2 Kings 10:15-28
(Read 2 Kings 10:15-28)
Is thine heart right? This is a question we should often put to ourselves. I make a fair profession, have gained a reputation among men, but, is my heart right? Am I sincere with God? Jehonadab owned Jehu in the work, both of revenge and of reformation. An upright heart approves itself to God, and seeks no more than his acceptance; but if we aim at the applause of men, we are upon a false foundation. Whether Jehu looked any further we cannot judge. The law of God was express, that idolaters were to be put to death. Thus idolatry was abolished for the present out of Israel. May we desire that it be rooted out of our hearts.