Musannaf Ibn Abi Shaybah

Hazrat Samurah bin Jundub narrates that a man said to the Messenger of Allah (peace be upon him): I saw in a dream that a bucket was lowered from the sky. Hazrat Abu Bakr came, held the rope of the bucket, and drank some water, but there was some weakness in him. Then Hazrat Umar came, he held the rope and began to drink until he was satisfied. Then Hazrat Uthman came, and he also held the rope of the bucket, drew water, and drank until he too was satisfied.