2 Kings 10:10-17

Know then [without any doubt] that there shall fall to the earth nothing of the word of the LORD, which the LORD spoke concerning the house of Ahab, for the LORD has done what He said through His servant Elijah.” [1 Kin 19:17] So Jehu killed all who remained of the house of Ahab in Jezreel, and all his great men and his familiar friends and his priests, until he left him without a survivor. And he set out and went to Samaria. On the way as he was at the place of the sand heaps [meeting place] for the shepherds, Jehu met the relatives of Ahaziah king of Judah and said, “Who are you?” They answered, “We are the relatives of Ahaziah; and we came down to greet the royal princes and the sons of the queen mother [Jezebel].” Then Jehu said, “Take them alive.” So they took them alive and [later] slaughtered them at the well by the place of the sand heaps, forty-two men; he left none of them [alive]. When Jehu went on from there, he met Jehonadab the son of Rechab coming to meet him. He greeted him and said to him, “Is your heart right, as my heart is with yours?” Jehonadab answered, “It is.” Jehu said “If it is, give me your hand.” He gave him his hand, and Jehu pulled him up into the chariot. And he said, “Come with me and see my zeal for the LORD.” So he had Jehonadab in his chariot. When Jehu came to Samaria, he killed everyone who remained of Ahab’s family in Samaria, until he had destroyed all of them, in accordance with the word of the LORD which He spoke to Elijah.