1 Samuel 17:12-17

12Now David was the son of that Ephrathite of Bethlehem-Judah whose name was Jesse; and he had eight sons; and the man was old in the days of Saul, advanced [in years] among men.

13And the three eldest of the sons of Jesse had gone and followed Saul to the battle; and the names of his three sons that went to the battle were Eliab the firstborn, and the second to him Abinadab, and the third Shammah.

14And David was the youngest; and the three eldest had followed Saul.

15But David went and returned from Saul to feed his father's sheep at Bethlehem.

16And the Philistine drew near morning and evening, and presented himself forty days.

17And Jesse said to David his son, Take, I pray, for thy brethren, this ephah of parched [corn] and these ten loaves, and carry them quickly to the camp to thy brethren;