2 Kings 10:6, 9-10, 15-16

Then Jehu wrote them a second letter, saying, “If you are on my side and will obey me, take the heads of your master’s sons and come to me in Jezreel by this time tomorrow.” Now the royal princes, seventy of them, were with the leading men of the city, who were rearing them.

The next morning Jehu went out. He stood before all the people and said, “You are innocent. It was I who conspired against my master and killed him, but who killed all these? Know, then, that not a word the LORD has spoken against the house of Ahab will fail. The LORD has done what he announced through his servant Elijah.”

After he left there, he came upon Jehonadab son of Rekab, who was on his way to meet him. Jehu greeted him and said, “Are you in accord with me, as I am with you?” “I am,” Jehonadab answered. “If so,” said Jehu, “give me your hand.” So he did, and Jehu helped him up into the chariot. Jehu said, “Come with me and see my zeal for the LORD.” Then he had him ride along in his chariot.