1 Samuel 17:42-49

42And when the Philistine looked about, and saw David, he disdained him: for he was but a youth, and ruddy, and of a fair countenance.

43And the Philistine said unto David, Am I a dog, that thou comest to me with staves? And the Philistine cursed David by his gods.

44And the Philistine said to David, Come to me, and I will give thy flesh unto the fowls of the air, and to the beasts of the field.

45Then said David to the Philistine, Thou comest to me with a sword, and with a spear, and with a shield: but I come to thee in the name of Yhwh of Armies, the God of the armies of Israel, whom thou hast defied.

46This day will Yhwh deliver thee into mine hand; and I will smite thee, and take thine head from thee; and I will give the carcases of the army of the Philistines this day unto the fowls of the air, and to the wild beasts of the earth; that all the earth may know that there is a God in Israel.1

47And all this assembly shall know that Yhwh saveth not with sword and spear: for the battle is Yhwh's, and he will give you into our hands.

48And it came to pass, when the Philistine arose, and came and drew nigh to meet David, that David hasted, and ran toward the army to meet the Philistine.

49And David put his hand in his bag, and took thence a stone, and slang it, and smote the Philistine in his forehead, that the stone sunk into his forehead; and he fell upon his face to the earth.