Ali was merely assigned a special mission to read the proclamation as according to Muhammad only a man from his own house could communate the revelation .
On this occasion Ali did not replace Abu Bakr as Amir - ul - Hajj .
Ali was merely assigned a special mission to read the proclamation as according to Muhammad only a man from Abu Bakr 's own house could communate the revelation .
On this occasion Ali did not replace Abu Bakr as Amir - ul - Hajj .