I Samuel 17:20

20 Early in the morning David left the flock in the care of a shepherd, loaded up and set out, as Jesse had directed. He reached the camp as the army was going out to its battle positions, shouting the war cry.

20 And David got up early in the morning, and, giving the sheep into the care of a keeper, took the things and went as Jesse had said; and he came to the lines where the carts were, when the army was going out to the fight giving their war-cry.