Xalifaning lavozimdagi muddati aniq bir davr bilan belgilanmaydi. Xalifa Shariatga amal qilar, uning qonunlarini ijro etar va Davlat vazifalari hamda Xilofat mas'uliyatlarini bajara olar ekan, u lavozimida qoladi. Buning sababi shuki, bay'at haqidagi nashlar mutlaq holda kelgan va hech qanday aniq vaqt muddati bilan cheklanmagan. Anas ibn Molik rivoyat qilishicha, Allohning Elchisi ﷺ shunday degan:

The time term of the Khalifah in office is not determined by a certain period. As long as the Khalifah abides by the Sharia, executes its laws and is able to perform the duties of the State and the responsibilities of the Khilafah, he remains in office. This is because the texts concerning the bayah came as undefined (mutlaq) and were not restricted to any specific period of time. Anas b. Malik reported that the Messenger of Allah (PBUH) said: .

"Eshit va itoat qil, garchi sendan ustun qilib qo'yilgan kishi kishmishdek sochli habashiy qul bo'lsa ham". [Buxoriy, Sahih, #7142].

"Do hear and obey, even if you were ruled by an Abyssinian slave, whose hair is like the raisin". [Bukhari, Sahih, #7142] .