Narrated ‘Abdullah:
Allah’s Apostle said, “I saw (in a dream) the people assembled in a gathering, and then Abu Bakr got up and drew one or two buckets of water (from a well) but there was weakness in his drawing. May Allah forgive him. Then ‘Umar took the bucket and in his hands it turned into a very large bucket. I had never seen anyone amongst: the people who could draw the water as strongly as ‘Umar till all the people drank their fill and watered their camels that knelt down there.
Sahih Bukhari, Volume 4, Book56, Number 828