What does 1 Samuel 21:6 mean?

Now therefore what is under your hand? Please give me five loaves of bread in my hand, or whatever is available.”

The priest answered David, and said, “I have no common bread, but there is holy bread; if only the young men have kept themselves from women.”

David answered the priest, and said to him, “Truly, women have been kept from us as usual these three days. When I came out, the vessels of the young men were holy, though it was only a common journey. How much more then today shall their vessels be holy?”

Now a certain man of the servants of Saul was there that day, detained before Yahweh; and his name was Doeg the Edomite, the best of the herdsmen who belonged to Saul.

David said to Ahimelech, “Isn’t there here under your hand spear or sword? For I have neither brought my sword nor my weapons with me, because the king’s business required haste.”

The priest said, “Behold, the sword of Goliath the Philistine, whom you killed in the valley of Elah, is here wrapped in a cloth behind the ephod. If you would like to take that, take it; for there is no other except that here.” David said, “There is none like that. Give it to me.”