1 Samuel 17:13-17

The three older sons of Jesse had followed Saul to the battle. And the names of his three sons who had gone into the battle were Eliab the firstborn, and second to him, Abinadab, and the third, Shammah.

So David was the youngest. Now the three oldest followed Saul,

but David went back and forth from Saul to tend his father’s flock at Bethlehem.

And the Philistine came forward morning and evening, and took his stand for forty days.

Then Jesse said to his son David, “Take now for your brothers an ephah of this roasted grain and these ten loaves, and run to the camp to your brothers.