1 Samuel 17:34-36

But David persisted. “I have been taking care of my father’s sheep and goats,” he said. “When a lion or a bear comes to steal a lamb from the flock, I go after it with a club and rescue the lamb from its mouth. If the animal turns on me, I catch it by the jaw and club it to death. I have done this to both lions and bears, and I’ll do it to this pagan Philistine, too, for he has defied the armies of the living God!