1 Samuel 17:16-21
English Standard Version
17And Jesse said to David his son, "Take for your brothers an ephah of this parched grain, and these ten loaves, and carry them quickly to the camp to your brothers.
18Also take these ten cheeses to the commander of their thousand. See if your brothers are well, and bring some token from them."
19Now Saul and they and all the men of Israel were in the Valley of Elah, fighting with the Philistines.
20And David rose early in the morning and left the sheep with a keeper and took the provisions and went, as Jesse had commanded him. And he came to the encampment as the host was going out to the battle line, shouting the war cry.
21And Israel and the Philistines drew up for battle, army against army.
