Interpretation of Dreams

Bukhari :: Book 9 :: Volume 87 :: Hadith 157

Narrated 'Abdullah bin 'Umar:

I heard Allah's Apostle saying, "While I was sleeping, I saw that a cup full of milk was brought to me and I drank of it and gave the remaining of it to 'Umar bin Al-Khattab." They asked. What have you interpreted (about the dream)? O Allah's Apostle?" The Prophet said. "(It is Religious) knowledge."