1 Samuel 17:30

28Eliab his oldest brother heard when he spoke to the men; and Eliab’s anger burned against David, and he said, “Why have you come down? With whom have you left those few sheep in the wilderness? I know your pride and the evil of your heart; for you have come down that you might see the battle.”

29David said, “What have I now done? Is there not a cause?”

30He turned away from him toward another, and spoke like that again; and the people answered him again the same way.

31When the words were heard which David spoke, they rehearsed them before Saul; and he sent for him.

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