As he talked with them, behold, there came up the champion, the Philistine of Gath, Goliath by name, out of the ranks of the Philistines, and spoke according to the same words: and David heard them.
And so David's brother Eliab saw David's interest in this thing, and he said to David, "Who's watching over your sheep back there in the wilderness kid? You better get on home in a hurry. I know your heart, you're just-dad probably didn't send you down here. You're just down to see what a war looks like and you go home in a hurry." His big brother is trying to sort of protect him.