What does 1 Samuel 17:50 mean?
The writer pauses the action for just a moment to poetically call attention to the impossible thing that has just taken place. David, a youth without armor or sword (1 Samuel 17:33, 40), has defeated the impossibly massive, battle-hardened champion of the Philistines covered in armor and carrying advanced battle weapons (1 Samuel 17:4–7, 45). David has used a sling (Judges 20:16; 1 Chronicles 12:2) to send a sizable rock directly into the giant's face, caving in the Philistine's skull and dropping him face down on the field of battle (1 Samuel 17:49).David was clear from the start about why this would take place: "I come to you in the name of the Lord of hosts, the God of the armies of Israel, whom you have defied. This day the Lord will deliver you into my hand" (1 Samuel 17:45–46). Here, the writer continues to emphasize that David's victory was not a fluke nor was it due to David's unique skill and courage. Nor did it even require some supernatural act by God. David's victory was accomplished with a normal weapon, used in a normal way. The point of this story is how the Lord has delivered His people through someone willing to trust His faithfulness and power, even at the cost of putting his own life at risk (1 Samuel 17:26, 37). There was never a reason for Israel to fear Goliath so long as they relied on God.
While the outcome is clear, the battle is not quite over. David will not hesitate to finish off the Philistine champion (1 Samuel 17:51).