1 Samuel 17:49-50

17:49 David reached his hand into the bag and took out a stone. He slung it, striking the Philistine on the forehead. The stone sank deeply into his forehead, and he fell down with his face to the ground.

17:50 ¹ David prevailed over the Philistine with just the sling and the stone. He struck down the Philistine and killed him. David did not even have a sword in his hand. ² 

[17:50]  ¹ tc Most LXX mss lack v. 50.

[17:50]  ² tn Verse 50 is a summary statement; v. 51 gives a more detailed account of how David killed the Philistine.