1 Samuel 17:42

39 And David girded his sword upon his armour, and he assayed to go; for he had not proved [it]. And David said unto Saul, I cannot go with these; for I have not proved [them]. And David put them off him.

40 And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd’s bag which he had, even in a scrip; and his sling [was] in his hand: and he drew near to the Philistine.

41 And the Philistine came on and drew near unto David; and the man that bare the shield [went] before him.

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

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

44 And 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.

45 Then 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 the LORD of hosts, the God of the armies of Israel, whom thou hast defied.