It is narrated from Sayyiduna Kulda bin Hanbal (may Allah be pleased with him) that Sayyiduna Safwan bin Umayyah (may Allah be pleased with him) sent me to the Prophet (peace and blessings of Allah be upon him) on the occasion of the conquest of Makkah with milk, a roasted fawn, and some vegetables. The Prophet (peace and blessings of Allah be upon him) was at that time in the upper part of the valley of Makkah. I went to the Prophet (peace and blessings of Allah be upon him) without greeting or seeking permission, so the Prophet (peace and blessings of Allah be upon him) said: "Go back and say: «السلام علیکم» ! May I come in?" This incident took place after Safwan had embraced Islam. Amr bin Abi Sufyan says that Umayyah bin Safwan also narrated this incident to me from Sayyiduna Kulda (may Allah be pleased with him), but he did not say that he had heard it from Sayyiduna Kulda (may Allah be pleased with him).

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When someone has looked inside (the house), then permission is not for him."

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he says that when a person says: May I come in? and does not say «السلام علیکم» , then say to him: No, you cannot come in until you bring the key. I said: «السلام» ......? He said: Yes.

It is narrated from a man of Banu Amir that he came to the service of the Prophet (peace be upon him) and said: "May I come in?" The Prophet (peace be upon him) said to a slave girl: "Go outside and tell him to seek permission like this: «السلام علیکم» , may I come in? He does not know how to seek permission properly." He says that before the slave girl went out, I heard the words of the Prophet (peace be upon him) and said: «السلام علیکم» , may I come in? The Prophet (peace be upon him) said: "And upon you, come in." I entered and said: "What have you brought (from Allah)?" The Prophet (peace be upon him) said: "I have brought nothing but good for you. I have come to you so that you worship Allah alone with no partner, and abandon the worship of Lat and Uzza, perform five prayers in the day and night, fast for one month in the year, perform Hajj of this House (the Ka'bah), and take wealth from your rich and give it to your poor." He says: I asked: "Is there any knowledge from among the knowledge that you do not know?" The Prophet (peace be upon him) said: "Allah alone has granted the knowledge of good, and there are many matters of knowledge that none knows except Allah. Five things are such that none knows except Allah." Then he recited this verse: «إِنَّ اللَّهَ عِنْدَهُ عِلْمُ السَّاعَةِ وَيُنَزِّلُ الْغَيْثَ وَيَعْلَمُ مَا فِي الْأَرْحَامِ وَمَا تَدْرِي نَفْسٌ مَاذَا تَكْسِبُ غَدًا وَمَا تَدْرِي نَفْسٌ بِأَيِّ أَرْضٍ تَمُوتُ» [سورہ لقمان: 34] "With Allah alone is the knowledge of the Hour, He sends down the rain, He knows what is in the wombs. No person knows what he will earn tomorrow, and no person knows in which land he will die."

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them) that he said: Sayyiduna Umar (may Allah be pleased with him) sought permission to go to the Prophet (peace and blessings of Allah be upon him) and said: «السلام علی رسول الله، السلام علیکم» , Can Umar come in?

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that I came to the Prophet (peace and blessings of Allah be upon him) regarding my father's debt and knocked at the door. The Prophet (peace and blessings of Allah be upon him) said: "Who is it?" I replied: "It is I." The Prophet (peace and blessings of Allah be upon him) said: "'It is I, it is I?'" as if he disliked this response.

It is narrated from Sayyiduna Buraidah (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) went towards the mosque and Sayyiduna Abu Musa Ash'ari (may Allah be pleased with him) was reciting (the Qur'an). The Prophet (peace be upon him), seeing me, said: "Who are you?" I replied: "I am Buraidah, may I be sacrificed for you." The Prophet (peace be upon him) said: "This person (Abu Musa) has certainly been given the melodious voice of Dawud (peace be upon him)."

It is narrated from Abdur Rahman bin Jad'an (may Allah have mercy on him) that I was with Sayyiduna Abdullah bin Umar (may Allah be pleased with them). He sought permission to enter from the people of a house, and the reply came: Enter in peace. He refused to enter.

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When someone has peeped inside, then there is no permission for him anymore."

It is narrated from Muslim bin Nazeer (may Allah have mercy on him), he said that a man sought permission from Sayyiduna Hudhaifah (may Allah be pleased with him), so he peeked in and said: "May I come in?" Sayyiduna Hudhaifah (may Allah be pleased with him) said: "Your eye has already entered, only your body remains (so what is the need for permission now?)"

And a man asked: "Should I seek permission even to go to my mother?" He replied: "If you do not seek permission, you may see something that you would dislike to see."