1 Samuel 17:32-36

32David said to Saul, “Let no one’s heart fail because of him. Your servant will go and fight with this Philistine.”

33Then Saul said to David, “You can’t go fight this Philistine—for you’re just a youth, and he’s been a warrior since his youth.”

34But David said to Saul, “Your servant has been tending his father’s sheep. When a lion or a bear came and carried off a lamb out of the flock,

35I went out after it, struck it down, and rescued the lamb out of its mouth. If it rose up against me, I grabbed him by its fur, struck it and killed it.

36Your servant has killed both the lion and the bear, so this uncircumcised Philistine will become like one of them—since he has defied the ranks of the living God.”