1 Samuel 17:14 (KJV)

Now David was the son of that Ephrathite of Beth–lehem–judah, whose name was Jesse; and he had eight sons: and the man went among men for an old man in the days of Saul.

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.

And David was the youngest: and the three eldest followed Saul.

But David went and returned from Saul to feed his father’s sheep at Beth–lehem.

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