Sahih Bukhari

Narrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) said, ""While I was sleeping, I was given a bowl full of milk (in the dream) and I drank from it (to my fill) till I noticed its wetness coming out of my limbs. Then I gave the rest of it to `Umar bin Al-Khattab."" The persons sitting around him, asked, ""What have you interpreted (about the dream) O Allah's Messenger (ﷺ)?"" He said, ""(It is religious) knowledge