Salim bin 'Abdullah narrated from 'Abdullah bin 'Umar about the dream of the Prophet (s.a.w) and Abu Bakr and 'Umar, so he said:
"I saw that the people had gathered, so Abu Bakr drew a bucket or two buckets- in him was some weakness- and Allah forgive him. Then 'Umar stood to draw and the bucket turned into a very large one, and I have never seen a strong man toiling so hard until it was as if the people had gathered at a (camel) watering hole." (ES)
English reference (ES): Vol. 4, Book 8, Hadith 2289 (ES)
Arabic reference (ES): Book 34, Hadith 2458 (ES)