WE NARRATE IN [the book of Ibn as-Sunnī] the famous hadith about the address of Abū Bakr aṣ-Ṣiddīq 
on the day the Prophet 
passed away. He said: “For whoever worshipped Muḥammad, Muḥammad has passed away; and for whoever worshipped Allah, Allah is Living and does not die.” [1].
on the day the Prophet passed away. He said: “For whoever worshipped Muḥammad, Muḥammad has passed away; and for whoever worshipped Allah, Allah is Living and does not die.” [1].We relate in the two Ṣaḥīḥs, from Jarīr ibn ‘Abdullāh, that on the day that al-Mughīrah ibn Shu‘bah—who was the governor of Baṣrah and Kūfah—passed away he [Jarīr] stood up, praised Allah 
and said: “I advise you to have fear of Allah alone without partner, and to remain dignified and calm until a leader comes to you, for he is coming now.” [2].
and said: “I advise you to have fear of Allah alone without partner, and to remain dignified and calm until a leader comes to you, for he is coming now.” [2].References
[1] Al-Bukhārī (3667).
[2] Al-Bukhārī (58) and Muslim (56).