Narrated 'Abdullah bin 'Umar: The Prophet said, "In a dream I saw myself drawing water from a well with a bucket. Abu Bakr came and drew a bucket or two weakly. May Allah forgive him. Then 'Umar bin Al-Khattab came and the bucket turned into a very large one in his hands. I had never seen such a mighty person as he in doing such hard work till all the people drank to their satisfaction and watered their camels that knelt down there.

— Sahih Bukhari, Volume 5, Book 57: Companions of the Prophet, Hadith #31