Sahih Bukhari

Narrated `Abdullah bin `Umar:I heard Allah's Messenger (ﷺ) 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 Messenger (ﷺ)?"" The Prophet (ﷺ) said. ""(It is Religious) knowledge