1 Samuel 17:17-19

17Jesse said to his son David, “Take your brothers this ephah of roasted grain and these ten loaves of bread; go quickly to the camp to your brothers.

18Also take these ten portions of cheese to their commanding officer. Find out how your brothers are doing and bring back their pledge that they received the goods.

19They are with Saul and the whole Israelite army in the valley of Elah, fighting with the Philistines.”