Narrated Kaladah ibn Hanbal: Safwan ibn Umayyah sent him with some milk, a young gazelle and some small cucumbers to the Messenger of Allah ﷺ when he was in the upper part of Makkah. I entered but I did not give a salutation. He said: Go back and say: "Peace be upon you"! This happened after Safwan ibn Umayyah and embraced Islam. Amr said: Ibn Safwan told me all this on the authority of Kaladah ibn Hanbal, and he did not say: I heard it from him. Abu Dawud said: Yahya bin Habib said: Umayyah bin Safwan. He did not say: I heard from Kaladah bin Hanbal. Yahya also said: Amr bin Abdullah bin Safwan told him that Kaladah bin al-Hanbal told him.

Narrated Ribi: A man of Banu Amir told that he asked the Prophet ﷺ for permission (to enter the house) when he was in the house, saying: May I enter ? The Prophet ﷺ said to his servant: Go out to this (man) and teach him how to ask permission to enter the house, and say to him: "Say: Peace be upon you. May I enter?" The man heard it and said: Peace be upon you! May I enter ? The Prophet ﷺ permitted him and he entered.