1 Samuel 17:9-13

If he is able to fight me and kill me, then we will become your servants; but if I prevail against him and kill him, then you shall become our servants and serve us.”

Then the Philistine said, “I have defied the ranks of Israel this day! Give me a man, so that we may fight together.”

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.