On what someone says when invited to eat and is followed by someone

Riyad as-Salihin (The Meadows of the Righteous)

by Imam Nawawi

103. Chapter: On what someone says when invited to eat and is followed by someone

739. Abu Mas'ud al-Badri said, "A man invited the Prophet, may Allah bless him and grant him peace, to a meal he had prepared for him and four others. A man followed them. When he reached the door, the Prophet, may Allah bless him and grant him peace, said, 'This man has followed us. If you like, you can give him permission, and if you like, he will go back.' He said, 'I give him permission, Messenger of Allah.'" [Agreed upon]