The men of Israel and of Judah arose, and shouted, and pursued the Philistines, until you come to Gai, and to the gates of Ekron. The wounded of the Philistines fell down by the way to Shaaraim, even to Gath, and to Ekron.
Saul needed to know the name of David’s father to deliver the prize that he had promised to anyone who would defeat Goliath (1 Samuel 17:25). Perhaps he had never asked David about this before or had forgotten whose son he was. Another explanation of Saul’s strange ignorance is that the events of chapter 17 may have happened chronologically before those of chapter 16.