1 Samuel 17:10-11,26

10 The Philistine said, I defy the armies of Israel this day; give me a man, that we may fight together.  11 When Saul and all Israel heard those words of the Philistine, they were dismayed, and greatly afraid. 

26 David spoke to the men who stood by him, saying, What shall be done to the man who kills this Philistine, and takes away the reproach from Israel? for who is this uncircumcised Philistine, that he should defy the armies of the living God?