1 Samuel 17:51-52

51David ran and stood over the Philistine. He took Goliath’s sword, pulled it out of its sheath, and made certain the Philistine was dead by cutting off his head. When the Philistines saw their hero had been killed, they fled.

52Then the soldiers of Israel and Judah rose up, shouted a battle cry, and pursued the Philistines as far as Gath and to the gates of Ekron. Wounded Philistines lay on the road to Shaaraim and all the way to Gath and Ekron.