Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that Sayyiduna Umar (may Allah be pleased with him) came to the Noble Prophet (peace and blessings be upon him), while he was sitting in an upper room. Sayyiduna Umar (may Allah be pleased with him) said: "Peace be upon you, O Messenger of Allah! Peace be upon you, may Umar come inside?"

Sayyiduna Abdullah bin Musa says: Mudrik sent me to Sayyidah Aisha (may Allah be pleased with her) so that I could ask her about some matters. When I came to her, she was performing the Duha prayer. I sat down so that she could finish her prayer. She said: You have taken a long time. So I asked the one who grants permission: How should I seek permission from her? He said: You should say like this: O Prophet, peace be upon you, and the mercy and blessings of Allah. Peace be upon us and upon the righteous servants of Allah. Peace be upon the Mothers of the Believers or the Wives of the Messenger. Peace be upon you. Then I went to Sayyidah. The complete hadith is coming in Fatawa Aisha.

It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says: I was sitting in a gathering of the Ansar when Sayyiduna Abu Musa Ash'ari (may Allah be pleased with him) came to us, and he seemed somewhat frightened. In fact, Sayyiduna Umar (may Allah be pleased with him) had summoned him. So I went to him and sought permission three times, but when I was not granted permission, I turned back, because the Messenger of Allah (peace and blessings be upon him) said: Whoever seeks permission three times from someone and is not granted permission, then he should return. When I informed Sayyiduna Umar (may Allah be pleased with him) of this hadith, he said: Bring proof of this, otherwise I will punish you. So I came to seek testimony. Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) said: The youngest among us should stand with you for this. Sayyiduna Abu Sa'id (may Allah be pleased with him) said: I was the youngest, so I stood up and testified that the Messenger of Allah (peace and blessings be upon him) said: Whoever seeks permission three times and is not granted permission, then he should return.

Ubaid bin Umair narrates that Sayyiduna Abu Musa Ash'ari (may Allah be pleased with him) went to the house of Sayyiduna Umar (may Allah be pleased with him) and sought permission to enter three times, but when permission was not granted, he turned back. Sayyiduna Umar said: Was I not just hearing the voice of Abu Musa Abdullah bin Qais? The household said: Yes, it was him. He said: Call him. So he was called. Sayyiduna Umar (may Allah be pleased with him) asked him: What made you do what you did? He said: I sought permission to enter three times, and when I was not granted permission, I turned back. This is the command we have been given. Sayyiduna Umar said: Bring proof for this, otherwise I will punish you. Sayyiduna Abu Musa went to the mosque or to the gathering of the Ansar and asked for a witness. They said: Our youngest servant will bear witness for you. So Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) stood up and bore witness for him. Sayyiduna Umar (may Allah be pleased with him) said: This Sunnah of the Messenger of Allah (peace and blessings be upon him) had remained hidden from me; the trade in the markets has made us heedless.

Sayyiduna Anas (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) sought permission to visit Sayyiduna Sa’d bin ‘Ubadah (may Allah be pleased with him) and said:“Peace be upon you and the mercy of Allah.”In response, he said,“And peace be upon you and the mercy of Allah,”but did not let the Prophet (peace and blessings be upon him) hear it. The Prophet (peace and blessings be upon him) greeted three times, and Sayyiduna Sa’d (may Allah be pleased with him) also replied three times, but did not let the Prophet (peace and blessings be upon him) hear it. Eventually, the Prophet (peace and blessings be upon him) turned back, and Sayyiduna Sa’d (may Allah be pleased with him) followed behind and said:“O Messenger of Allah! May my parents be sacrificed for you, whenever you greeted, I replied, but did not let you hear it. In fact, I wanted to gain as much of your greeting and blessing as possible.”Then he took the Prophet (peace and blessings be upon him) into the house and presented dried dates before him. The Prophet (peace and blessings be upon him) ate, and when he finished, he made this supplication:“May the righteous eat your food, may the angels send blessings upon you, and may those who are fasting break their fast with you.”

. Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: When any of you enters someone’s orchard and wishes to eat from there, he should call out: O owner of the orchard! He should call out three times. If the owner responds, then that is fine; otherwise, he may eat from the orchard. And when any of you passes by camels and wishes to drink the milk of the she-camels, he should call out: O owner of the camels! Or: O herder of the camels! If he responds, then that is correct; otherwise, he may milk and drink. Hospitality is for three days; anything beyond that is charity upon the guest.

It is narrated from Sayyiduna Anas that when the Messenger of Allah, peace and blessings be upon him, spoke, he would repeat his words three times, and similarly, when he greeted people with salam, he would say salam to them three times.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that a man asked: O Messenger of Allah! When a person meets his friend, should he bow to him? The Prophet (peace and blessings be upon him) said: No. He then asked: Should he embrace him and kiss him? The Prophet (peace and blessings be upon him) said: No. He said: Then should he shake hands with him? The Prophet (peace and blessings be upon him) said: Yes, if he wishes.

A man from the Banu Anz tribe narrates: I came with Sayyiduna Abu Dharr (may Allah be pleased with him). When he returned, the people separated from him, and I said: O Abu Dharr! I want to ask you about some matters of the Noble Prophet (peace and blessings be upon him). He said: But if it is a secret of the Messenger of Allah (peace and blessings be upon him), I will not tell you. I said: It is not a secret matter. The thing is, when a man meets another man, he takes his hand and shakes hands with him. Is this correct? He said: You have indeed asked a well-informed person. Whenever the Noble Prophet (peace and blessings be upon him) met me, he always took my hand and shook hands with me. However, there was one time when he did not shake hands; this happened in the last moments of his life. The Prophet (peace and blessings be upon him) sent a message to me while he was on his bed; this was at the time when he was suffering from his final illness. I found him lying down, and when I leaned over him, he raised his blessed hand and embraced me. This manner was so much better and more excellent than a handshake.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: When two Muslims meet each other and one of them takes the other's hand and shakes hands, it is incumbent upon Allah to participate in their supplication (i.e., to accept it), and He does not separate their hands until He has forgiven them.