1 Samuel 17:33-35
New International Version
33 Saul replied,(A) “You are not able to go out against this Philistine and fight him; you are only a young man, and he has been a warrior from his youth.”
34 But David said to Saul, “Your servant has been keeping his father’s sheep. When a lion(B) or a bear came and carried off a sheep from the flock, 35 I went after it, struck it and rescued the sheep from its mouth. When it turned on me, I seized(C) it by its hair, struck it and killed it.