Musannaf Ibn Abi Shaybah

Abu Al-Mundhir narrates that I asked Hasan Basri about a person who, due to cold or rain, needs to go to the Dhimmis; should he seek their permission? He replied: Yes!

Hazrat Ibn Aun says that I asked Imam Muhammad how should I seek permission from the People of the Book? He replied: If you wish, say this: Peace be upon those who follow guidance. May I come in?

Hazrat Husain narrates that Hazrat Abu Malik Ghafari said: When you enter a house in which there are polytheists, then say: "As-salamu 'alayna wa 'ala 'ibadillahis-saliheen." Translation: Peace be upon us and upon the righteous servants of Allah. They will think that you have greeted them, whereas you have avoided greeting them directly.

Ibrahim states that Abdur Rahman bin Yazid used to seek permission before entering upon the dhimmis.

Hazrat Abu Sinan narrates that Hazrat Saeed bin Jubair said: Do not enter upon the People of the Book without permission.

Ibrahim says that Hazrat Aswad used to say: "May I come in?"