The priest said, The sword of Goliath the Philistine, whom you killed in the valley of Elah, behold, it is here wrapped in a cloth behind the ephod: if you will take that, take it; for there is no other except that here. David said, There is none like that; give it me.
So David's saying, "I'm a CIA agent, I'm on a special mission for the king, and nobody knows about this special mission. It's just a secret mission that I'm on for King Saul. So my men are over here, and I need some bread for them.