1 Samuel 17:24-40

As soon as the Israelite army saw him, they began to run away in fright. “Have you seen the giant?” the men asked. “He comes out each day to defy Israel. The king has offered a huge reward to anyone who kills him. He will give that man one of his daughters for a wife, and the man’s entire family will be exempted from paying taxes!” David asked the soldiers standing nearby, “What will a man get for killing this Philistine and ending his defiance of Israel? Who is this pagan Philistine anyway, that he is allowed to defy the armies of the living God?” And these men gave David the same reply. They said, “Yes, that is the reward for killing him.” But when David’s oldest brother, Eliab, heard David talking to the men, he was angry. “What are you doing around here anyway?” he demanded. “What about those few sheep you’re supposed to be taking care of? I know about your pride and deceit. You just want to see the battle!” “What have I done now?” David replied. “I was only asking a question!” He walked over to some others and asked them the same thing and received the same answer. Then David’s question was reported to King Saul, and the king sent for him. “Don’t worry about this Philistine,” David told Saul. “I’ll go fight him!” “Don’t be ridiculous!” Saul replied. “There’s no way you can fight this Philistine and possibly win! You’re only a boy, and he’s been a man of war since his youth.” 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! The LORD who rescued me from the claws of the lion and the bear will rescue me from this Philistine!” Saul finally consented. “All right, go ahead,” he said. “And may the LORD be with you!” Then Saul gave David his own armor—a bronze helmet and a coat of mail. David put it on, strapped the sword over it, and took a step or two to see what it was like, for he had never worn such things before. “I can’t go in these,” he protested to Saul. “I’m not used to them.” So David took them off again. He picked up five smooth stones from a stream and put them into his shepherd’s bag. Then, armed only with his shepherd’s staff and sling, he started across the valley to fight the Philistine.