2 Kings 10:13-14
10:13 Jehu encountered the relatives of King Ahaziah of Judah. He asked, “Who are you?” They replied, “We are Ahaziah’s relatives. We have come down to see how the king’s sons and the queen mother’s sons are doing.”
10:14 He said, “Capture them alive!” So they captured them alive and then executed all forty-two of them in the cistern at Beth Eked. He left no survivors.