1 Samuel 17:17-20

Then Jesse said to David his son, “Take for your brothers an ephah of this roasted grain and these ten loaves of bread and run quickly to the camp to your brothers. Also take these ten cuts of cheese to the commander of the unit. See how your brothers are doing and bring back news of them. Now they are with Saul and all the men of Israel in the Valley of Elah, fighting with the Philistines.” So David got up early in the morning, left the flock with a keeper, picked up the provisions and went just as Jesse had directed him. And he came to the encampment as the army was going out in battle formation shouting the battle cry.