200 FAQ On Muslims Belief by Hafiz Ibn Ahmed Al Hakami

A--- The proofs are numerous: counting its period with thirty years which is the period of their leadership, preferring them to all other companions of the Prophet (Peace be upon him), and what has been narrated by Samura Ibn Jundub saying: that a man said: “O Allah's Messenger! I saw as if a bucket descended from the sky. Then came Abu Bakr and took it and he drank very few thereof Then, came 'Umar who took it and drank till he got satisfied. Then, came `Uthman who took it and drank till he got satisfied. Then, came `Ali who took it and it was drawn from him and something thereof was spelt over him.” (Abu Dawud and Ahmed)

In addition, the Ummah has agreed on their Caliphate and none contests against this but who went astray and adopted Innovations.