Sahih al-Bukhari 6246
Sahih al-Bukhari · Book 79: Asking Permission · If a man is invited, should he ask permission to enter
Narrated Abu Huraira:
حَدَّثَنَا أَبُو نُعَيْمٍ ، حَدَّثَنَا عُمَرُ بْنُ ذَرٍّ ،. وَحَدَّثَنَا مُحَمَّدُ بْنُ مُقَاتِلٍ ، أَخْبَرَنَا عَبْدُ اللَّهِ ، أَخْبَرَنَا عُمَرُ بْنُ ذَرٍّ ، أَخْبَرَنَا مُجَاهِدٌ ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ دَخَلْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَوَجَدَ لَبَنًا فِي قَدَحٍ فَقَالَ " أَبَا هِرٍّ الْحَقْ أَهْلَ الصُّفَّةِ فَادْعُهُمْ إِلَىَّ ". قَالَ فَأَتَيْتُهُمْ فَدَعَوْتُهُمْ، فَأَقْبَلُوا فَاسْتَأْذَنُوا فَأُذِنَ لَهُمْ، فَدَخَلُوا .
I entered (the house) along with Allah's Messenger (ﷺ) . There he found milk in a basin. He said, "O Abu Hirr! Go and call the people of Suffa to me." I went to them and invited them. They came and asked permission to enter, and when it was given, they entered. (See Hadith No. 459 for details)