1 Samuel 17:55

17:55 Now as Saul watched David going out to fight the Philistine, he asked Abner, the general in command of the army, “Whose son is this young man, Abner?” Abner replied, “As surely as you live, O king, I don’t know.”

1 Samuel 17:58

17:58 Saul said to him, “Whose son are you, young man?” David replied, “I am the son of your servant Jesse in Bethlehem.”