Fleeing from King Saul, David arrives alone at the city of Nob. To avoid arousing the suspicion of Ahimelech the priest, who would naturally wonder why such a prominent official is traveling by himself without supplies, David crafts a careful cover story. He claims to be on an urgent, highly classified mission assigned directly by the king. The extreme secrecy of this assignment is emphasized to explain his unusual circumstances; the king strictly commanded that both the very existence of the mission and its specific instructions remain completely hidden [מלבי״ם, מצודת דוד]. This strict order of confidentiality forced David to conceal his travel route and approach the priest entirely alone, leaving behind his customary royal entourage [אלשיך].
This heavy veil of secrecy serves multiple purposes. It provides a convenient excuse for David to request that Ahimelech inquire of God on his behalf in a vague and general way, without having to disclose the actual details of his situation [רלב״ג]. Furthermore, it sets the stage for him to secure provisions. While he arrived alone, David explains that he is not actually traveling by himself. The primary approach among commentators is that David informed his men in advance, instructing them to travel ahead and wait for him. Another perspective suggests that he specifically troubled his servants to run ahead of him to a designated meeting spot [רש״י].
The rendezvous point where these servants are supposedly waiting is described as a completely hidden and nameless location—a place whose very nature demands silence and cannot be spoken of [רש״י, רד״ק, מצודת ציון]. David explains that he intentionally left his men in this undisclosed hiding spot to ensure that casual passersby would not discover and expose their position [מלבי״ם]. With this final detail, the cover story is complete. David seamlessly justifies his urgent request for bread not as the desperate plea of a man running for his life, but rather as the responsible concern of a commander providing for his hungry, waiting troops [אלשיך].