1 Samuel 17:40; 1 Samuel 17:43

40 He took his stick in his hand and chose for himself five smooth stones from the brook, and put them in the shepherd's bag which he had, even in his pouch, and his sling was in his hand; and he approached the Philistine.

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