Abu Wa'il narrates from Sayyiduna Abu Mas'ud, that is, Uqbah bin Amr (may Allah be pleased with him), that a man of the Ansar called Abu Shu'ayb noticed hunger in the face of the Messenger of Allah (peace and blessings be upon him). He said to his servant, who was a butcher: "Prepare food for us; perhaps I will invite the Messenger of Allah (peace and blessings be upon him) as one of five people." When the Messenger of Allah (peace and blessings be upon him) came, a man followed them without an invitation. The Messenger of Allah (peace and blessings be upon him) said to the host: "This man has followed us without an invitation; do you give him permission?" He gave permission.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14543