So David prevailed over the Philistine with a sling and with a stone, and struck the Philistine, and killed him; but there was no sword in the hand of David.
". . . the text is not focused on chronological reporting but intends rather a dual topical introduction of David, who as a young man already manifested the gifts that would gain him renown as the sweet psalm-singer of Israel as well as the mighty warrior of the Lord." [Note: Longman and Dillard, p. 23.] 