1 Samuel 17:51-52

51So he ran and stood over the Philistine, grasped his sword and drew it out of its sheath and killed him, and cut off his head with it. When the Philistines saw that their [mighty] champion was dead, they fled.

52The men of Israel and Judah stood with a shout and pursued the Philistines as far as the entrance to the valley and the gates of Ekron. And the [fatally] wounded Philistines fell along the way to Shaaraim, even as far as Gath and Ekron.