2 Kings 10:13-14

13He met some relatives of Ahaziah, the king of Judah. Jehu asked them, ‘Who are you?’ They said, ‘We are relatives of Ahaziah. We are going to Jezreel to visit the families of the king and his mother.’

14Jehu said to his men, ‘Catch them, but do not kill them!’ So they took hold of them. Then they killed them all near the well at Beth Eked. They killed 42 people, so that none of them remained alive.