As the Philistine moved closer to attack him,
David ran quickly toward the battle line to meet him.
Reaching into his bag and taking out a stone,
he slung it and struck the Philistine on the forehead.
The stone sank into his forehead, and he fell facedown on the ground.
So David triumphed over the Philistine with a sling and a stone;
without a sword in his hand he struck down the Philistine and killed him.
1 Samuel 17:48-50