48 As the Philistine moved closer to attack him, David ran quickly toward the battle line to meet him. 49 Reaching into his bag and taking out a stone, he slung it and struck the Philistine on the forehead. The stone sank into his forehead, and he fell facedown on the ground. 50 So David triumphed over the Philistine with a sling and a stone; without a sword in his hand he struck down the Philistine and killed him. 51 David ran and stood over him. He took hold of the Philistine's sword and drew it from the sheath. After he killed him, he cut off his head with the sword. When the Philistines saw that their hero was dead, they turned and ran. 52 Then the men of Israel and Judah surged forward with a shout and pursued the Philistines to the entrance of Gath[1] and to the gates of Ekron. Their dead were strewn along the Shaaraim road to Gath and Ekron. 53 When the Israelites returned from chasing the Philistines, they plundered their camp. 54 David took the Philistine's head and brought it to Jerusalem; he put the Philistine's weapons in his own tent. 55 As Saul watched David going out to meet the Philistine, he said to Abner, commander of the army, "Abner, whose son is that young man?" Abner replied, "As surely as you live, Your Majesty, I don't know." 56 The king said, "Find out whose son this young man is." 57 As soon as David returned from killing the Philistine, Abner took him and brought him before Saul, with David still holding the Philistine's head. 58 "Whose son are you, young man?" Saul asked him. David said, "I am the son of your servant Jesse of Bethlehem."

Matthew Henry's Commentary on 1 Samuel 17:48-58

Commentary on 1 Samuel 17:48-58

(Read 1 Samuel 17:48-58)

See how frail and uncertain life is, even when a man thinks himself best fortified; how quickly, how easily, and by how small a matter, the passage may be opened for life to go out, and death to enter! Let not the strong man glory in his strength, nor the armed man in his armour. God resists the proud, and pours contempt on those who defy him and his people. No one ever hardened his heart against God and prospered. The history is recorded, that all may exert themselves for the honour of God, and the support of his cause, with bold and unshaken reliance on him. There is one conflict in which all the followers of the Lamb are, and must be engaged; one enemy, more formidable than Goliath, still challenges the armies of Israel. But "resist the devil, and he will flee from you." Go forth to battle with the faith of David, and the powers of darkness shall not stand against you. But how often is the Christian foiled through an evil heart of unbelief!