Abu Huraira told that he heard God's messenger say, "While I was asleep I saw myself above a well on which there was a bucket. I drew from it what God wished, then the son of Abu Quhafa[1] drew from it one bucketful or two, but in his drawing there was some weakness for which may God forgive him. It then changed into a large bucket which the son of al-Khattab took hold of, and I have never seen a strong man drawing as `Umar did, till the camels had enough and lay down[2]."
[1] i.e., Abu Bakr
[2] Or, "the people satisfied their thirst and stayed by the water." The Arabic is darab an nas bi-aian
In Ibn `Umar's version he said, "Then the son of al-Khattab took it from Abu Bakr's hand and it changed into a large bucket. I have not seen a strong man accomplishing what he did, till the people had enough and the camels had enough and lay down."
(Bukhari and Muslim)