(34) باب إِذَا أَعْطَى فَضْلَهُ غَيْرَهُ فِي النَّوْمِ
Narrated `Abdullah bin `Umar:
I heard Allah's Messenger (ﷺ) saying, "While I was sleeping, I saw a bowl full of milk was brought to me and I drank of it (to my fill) till I noticed its wetness flowing (in my body). Then I gave the remaining of it to `Umar." They asked, "O Allah's Messenger (ﷺ)! What have you interpreted (about the dream)? He said, "(It is Religious) knowledge." (See Hadith No. 134)
Reference: Sahih al-Bukhari 7027
In-book reference: Book 91, Hadith 44
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 87, Hadith 154