Sahih Bukhari
Companions of the Prophet
Volume: 005 / Book Number: 057 / Hadith Number: 25
Narrated Abdullah bin Umar: Allah's Apostle said. "While (in a dream), I was standing by a well, drawing water from it. Abu Bakr and 'Umar came to me. Abu Bakr took the bucket (from me) and drew one or two buckets of water, and there was some weakness