1 Samuel 17:51-52

51Then David ran over and pulled Goliath’s sword from its sheath. David used it to kill him and cut off his head. When the Philistines saw that their champion was dead, they turned and ran.

52Then the men of Israel and Judah gave a great shout of triumph and rushed after the Philistines, chasing them as far as Gath and the gates of Ekron. The bodies of the dead and wounded Philistines were strewn all along the road from Shaaraim, as far as Gath and Ekron.