Abu Bakr
Overview
Abu Bakr was a senior companion (Sahabi
Sahabah
In Islam, the ' were the companions, disciples, scribes and family of the Islamic prophet...

) and the father-in-law of the Islamic prophet Muhammad
Muhammad
Muhammad |ligature]] at U+FDF4 ;Arabic pronunciation varies regionally; the first vowel ranges from ~~; the second and the last vowel: ~~~. There are dialects which have no stress. In Egypt, it is pronounced not in religious contexts...

. He ruled over the Rashidun Caliphate
Rashidun Caliphate
The Rashidun Caliphate , comprising the first four caliphs in Islam's history, was founded after Muhammad's death in 632, Year 10 A.H.. At its height, the Caliphate extended from the Arabian Peninsula, to the Levant, Caucasus and North Africa in the west, to the Iranian highlands and Central Asia...

 from 632-634 CE when he became the first Muslim Caliph
Caliph
The Caliph is the head of state in a Caliphate, and the title for the ruler of the Islamic Ummah, an Islamic community ruled by the Shari'ah. It is a transcribed version of the Arabic word   which means "successor" or "representative"...

 following Muhammad's death. As Caliph
Caliph
The Caliph is the head of state in a Caliphate, and the title for the ruler of the Islamic Ummah, an Islamic community ruled by the Shari'ah. It is a transcribed version of the Arabic word   which means "successor" or "representative"...

, Abu Bakr succeeded to the political and administrative functions previously exercised by the Prophet, since the religious function and authority of prophethood ended with Muhammad's death according to Islam
Islam
Islam . The most common are and .   : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...

.
 
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