Sahih al-Bukhari Book 62, Hadith 31
Allah's Messenger (ﷺ) said, "While I was sleeping, I saw myself drinking (i.e. milk), and I was so contented
that I saw the milk flowing through my nails. Then I gave (the milk) to `Umar." They (i.e. the
companions of the Prophet) asked, "What do you interpret it?" He said, "Knowledge."
While we were with Allah's Messenger (ﷺ) he said, "While I was sleeping, I saw myself in Paradise, and suddenly I saw a woman performing ablution beside a palace. I asked, 'For whom is this palace?' They replied, 'It is for `Umar.' Then I remembered `Umar's Ghira (self-respect) and went away quickly." `Umar wept and said, O Allah's Messenger (ﷺ)! How dare I think of my ghira (self-respect) being offended by you?
The Prophet (ﷺ) said, "In a dream I saw myself drawing water from a well with a bucket. Abu Bakr came and drew a bucket or two weakly. May Allah forgive him. Then `Umar bin Al-Khattab came and the bucket turned into a very large one in his hands. I had never seen such a mighty person as he in doing such hard work till all the people drank to their satisfaction and watered their camels that knelt down there.