Bismillah Walhamdulillah Was Salaatu Was Salaam ‘ala Rasulillah
Narrated Hamza’s father (Radi-Allahu ‘anhu):
Allah’s Apostle (Sallallahu ‘Alaihi Wa Sallam) 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, “How do you interpret it?” He said, "Knowledge.“
Bukhari Vol. 5 : No. 30