40 And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in the shepherd's bag that he had, into the pocket; and his sling was in his hand. And he drew near to the Philistine. 41 And the Philistine came on and approached David; and the man that bore the shield was before him. 42 And when the Philistine looked about and saw David, he disdained him; for he was a youth, and ruddy, and besides of a beautiful countenance. 43 And the Philistine said to David, Am I a dog, that thou comest to me with staves? And the Philistine cursed David by his gods. 44 And the Philistine said to David, Come to me, and I will give thy flesh to the fowls of the heavens and to the beasts of the field. 45 And David said to the Philistine, Thou comest to me with sword, and with spear, and with javelin; but I come to thee in the name of Jehovah of hosts, the God of the armies of Israel, whom thou hast defied. 46 This day will Jehovah deliver thee up into my hand; and I will smite thee, and take thy head from thee; and I will give the carcases of the camp of the Philistines this day to the fowl of the heavens and to the wild beasts of the earth. And all the earth shall know that Israel has a God; 47 and all this congregation shall know that Jehovah saves not with sword and spear; for the battle is Jehovah's, and he will give you into our hands.
48 And it came to pass, when the Philistine arose, and came and advanced to meet David, that David hasted, and ran towards the ranks to meet the Philistine. 49 And David put his hand into the bag, and took thence a stone, and slang it, and smote the Philistine in his forehead, and the stone sank into his forehead; and he fell on his face to the earth. 50 So David overcame the Philistine with a sling and a stone, and smote the Philistine and killed him; and there was no sword in the hand of David. 51 And David ran, and stood upon the Philistine, and took his sword, and drew it out of its sheath, and killed him completely, and cut off his head with it. And when the Philistines saw that their hero was dead, they fled.
Matthew Henry's Commentary on 1 Samuel 17:40-51
Commentary on 1 Samuel 17:40-47
(Read 1 Samuel 17:40-47)
The security and presumption of fools destroy them. Nothing can excel the humility, faith, and piety which appear in David's words. He expressed his assured expectation of success; he gloried in his mean appearance and arms, that the victory might be ascribed to the Lord alone.
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!