The Ruling on Taṭafful [Gatecrashing]
Narrated by Abū Masʿūd al-Anṣārī (رضي الله عنه) that a man from among the Anṣār invited the Prophet (صلى الله عليه وسلم) [for food] to be the fifth of five of his companions [i.e., the Prophet (صلى الله عليه وسلم) and four of his companions]. When they arrived, another uninvited man followed them. So when they arrived at the door, the Prophet (صلى الله عليه وسلم) said: “Indeed, this man has followed us. If you wish, allow him [to dine with us]. Or if you wish, he will return.” The [host] replied: “Nay, I grant him permission O Messenger of Allāh.”1
Ibn Qudāmah (رحمه الله) said: The testimony...