1 Samuel 17:43

39David strapped his sword on his clothing and he tried to move, for he had not tested it. David said to Saul, “I can’t go with these, for I have not tested them.” Then David took them off.

40He took his staff in his hand, and chose for himself five smooth stones out of the brook, and put them in the pouch of his shepherd’s bag which he had. His sling was in his hand; and he came near to the Philistine.

41The Philistine walked and came near to David; and the man who bore the shield went before him.

42When the Philistine looked around and saw David, he disdained him; for he was but a youth, and ruddy, and had a good looking face.

43The Philistine said to David, “Am I a dog, that you come to me with sticks?” The Philistine cursed David by his gods.

44The Philistine said to David, “Come to me, and I will give your flesh to the birds of the sky and to the animals of the field.”

45Then David said to the Philistine, “You come to me with a sword, with a spear, and with a javelin; but I come to you in the name of the LORD of Armies, the God of the armies of Israel, whom you have defied.

46Today, the LORD will deliver you into my hand. I will strike you and take your head from off you. I will give the dead bodies of the army of the Philistines today to the birds of the sky and to the wild animals of the earth, that all the earth may know that there is a God in Israel,

47and that all this assembly may know that the LORD doesn’t save with sword and spear; for the battle is the LORD’s, and he will give you into our hand.”