1 Kings 18:28

18:28 So they yelled louder and, in accordance with their prescribed ritual, mutilated themselves with swords and spears until their bodies were covered with blood.

1 Kings 2:31

2:31 The king told him, “Do as he said! Strike him down and bury him. Take away from me and from my father’s family the guilt of Joab’s murderous, bloody deeds.