1 Samuel 17:11-15

When Saul and all Israel heard these words of the Philistine, they were dismayed and very fearful.

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

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.