It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), he said: When a person is called, it is as if he has been given permission.
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1074
Hadith Gradingالألبانی:صحيح الإسناد موقوفًا
Hadith Takhrij«صحيح الإسناد موقوفًا : أخرجه ابن أبى شيبة : 25828 و الطبراني فى الكبير : 107/9 - أنظر الإرواء : 1956»
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When any of you is invited, and he comes along with the inviter, then this is permission for him."
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1075
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه أبوداؤد ، كتاب الأدب : 5190 و رواه أحمد : 533/2 من حديث سعيد بن أبى عروية به»
It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "When a person sends someone as a messenger to call another, that itself is permission."
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1076
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه أبوداؤد ، كتاب الأدب : 5189 - أنظر الإرواء : 1955»
It is narrated from Abu Alaniyah (may Allah have mercy on him) that I went to Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) and said «السلام علیکم», but I was not granted permission to enter. I said «السلام علیکم» again, but still was not granted permission. Then, for the third time, I raised my voice and said «السلام علیکم»: O people of the house! «السلام علیکم». But still, I was not granted permission, so I sat down to one side of the door. Then a boy came out of the house to me and said: Come in, so I entered. Sayyiduna Abu Sa'id (may Allah be pleased with him) said: Indeed, if you had greeted more than this (three times), you would not have been granted permission. Then I asked him about vessels. For every vessel I asked about, he said: It is forbidden. Until I asked him about the jaf (leather vessel), and he said: It is forbidden. Muhammad bin Sirin (may Allah have mercy on him) said: Jaf is the vessel whose mouth is covered with leather and tied with a strap.
Hadith Referenceالادب المفرد / كتاب الاستئذان / 1077
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه شرطه الأول عبدالرزاق : 19424 و الخطيب فى الجامع لأخلاق الراوي : 243 و أخرج شرطه الثاني أحمد : 11633 و عبدالرزاق : 16947 و أبويعلى : 1302 - الصحيحة : 2951»