Sahih Muslim Hadith 3508

When Allah's Apostle ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌) contracted marriage with Zainab (رضی اللہ عنہا), Umm Sulaim رضی اللہ عنہا sent him hats in a vessel of stone as a gift. Anas رضی اللہ عنہ stated that Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌) said to him: Go and invite on my behalf all the Muslims whom you meet. So I invited on his behalf everyone whom I met. They entered (his house) and they ate and went out. And Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) had kept his hand on the food, and he invoked blessing on that, and said whatever Allah wished him to say, and none whom I met was left uninvited. They ate to their fill and went out, but a group among them remained there and was engaged in lengthy discussion. Allah's Apostle ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) felt shy of saying them anything. So he went out and left them in his house and Allah the Great and Majestic revealed this verse: 0 you who believe, enter not the houses of the Prophet unless permission is given to you for a meal, not waiting for its cooking being finished. Qatada (instead of using the word Ghaira Nazirina) used the word Ghaira Mutahayyinina (i. e. not waiting for the time of the food). But when you are invited, enter... up to this verse. This is purer for your hearts and their hearts.