“And Eliab’s anger was kindled against David, and he said, ‘Why came you down here? and with whom have you left those few sheep in the wilderness? I know your pride, and the naughtiness of your heart; for you are come down that you might see the battle.’

And David said, ‘What have I now done? Is there not a cause?’

*     *     *

…”Then said David to the Philistine, ‘You come to me with a sword, and with a spear, and with a shield: but I come to you in the name of the Lord of hosts, the God of the armies of Israel, whom you have defied.’

…David prevailed over the Philistine with a sling and with a stone…”

I Samuel 17:28,29,45,50