Sayyiduna Anas bin Malik (may Allah be pleased with him) narrated that when the Messenger of Allah (peace and blessings be upon him) married Sayyidah Zaynab bint Jahsh (may Allah be pleased with her), he invited the people to a wedding feast (walimah). After eating, the people (remained inside the house and) continued talking for a long time. The Messenger of Allah (peace and blessings be upon him) acted as if he wanted to stand up (so that the people would understand and get up), but no one stood up. When he saw that no one was getting up, he himself stood up. When he stood up, the other people also stood up, but three men still remained sitting. When the Messenger of Allah (peace and blessings be upon him) came back inside from outside, he saw that some people were still sitting. After that, those people also got up. Then I went to the service of the Prophet and informed him that those people had also left. So he came inside. I also wanted to enter, but the Messenger of Allah (peace and blessings be upon him) let down a curtain of the door between himself and me. After that, the blessed verse was revealed: "O you who believe! Do not enter the houses of the Prophet (without permission)..." until the end of the verse. (Al-Ahzab 53)