2 Kings 10:13-14

13Jehu 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].”

14Then 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].