Holy Bible
Holy Bible 17:13 And the three eldest sons of Jesse went and followed Saul to the battle: and the names of his three sons that went to the battle were Eliab the firstborn, and next unto him Abinadab, and the third Shammah.
17:14 And David was the youngest: and the three eldest followed Saul.
17:15 But David went and returned from Saul to feed his father’s sheep at Bethlehem.
17:16 And the Philistine drew near morning and evening, and presented himself forty days.
17:17 And Jesse said unto David his son, Take now for thy brethren an ephah of this parched corn, and these ten loaves, and run to the camp of thy brethren; 17:18 And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge.
17:19 Now Saul, and they, and all the men of Israel, were in the valley of Elah, fighting with the Philistines.
17:20 And David rose up early in the morning, and left the sheep with a keeper, and took, and went, as Jesse had commanded him; and he came to the trench, as the host was going forth to the fight, and shouted for the battle.
17:21 For Israel and the Philistines had put the battle in array, army against army.