Musannaf Ibn Abi Shayba 27:331

Muhammad ibn Bishr narrated to us, he said: Ubayd Allah ibn Umar narrated to us, he said: Abu Bakr ibn Salim narrated to us, from Salim ibn Abdullah ibn Umar, from his father, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "I was shown in a dream as if I were drawing water with a bucket and a pulley from a well. Then Abu Bakr came and drew one or two buckets, and he drew with a weak drawing—and may Allah forgive him. Then Umar ibn al-Khattab came and drew water, and it transformed into a large bucket. I have not seen a genius among the people who could perform his feat, until the people drank their fill and rested their camels at the watering place."