1 Samuel 17:12-22

Now David was the son of the Ephrathite  from Bethlehem of Judah named Jesse. Jesse had eight sons  and during Saul’s reign was already an old man. Jesse’s three oldest sons had followed Saul to the war, and their names  were Eliab, the firstborn, Abinadab, the next, and Shammah, the third, and David was the youngest.  The three oldest had followed Saul, but David kept going back and forth from Saul  to tend his father’s flock in Bethlehem. Every morning and evening for forty days the Philistine came forward and took his stand. One day Jesse had told his son David, “Take this half-bushel  of roasted grain along with these ten loaves of bread  for your brothers and hurry to their camp. Also take these ten portions of cheese to the field commander.  Check on the well-being of your brothers  and bring a confirmation from them. 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 someone to keep it, loaded up, and set out as Jesse had charged him. He arrived at the perimeter of the camp  as the army was marching out to its battle formation shouting their battle cry. Israel and the Philistines lined up in battle formation facing each other. David left his supplies in the care of the quartermaster  and ran to the battle line. When he arrived, he asked his brothers how they were.