Abdullah bin Umar (may Allah be pleased with them both) said: I heard the Messenger of Allah (peace and blessings be upon him) say: I was sleeping, and (in that state) a bowl of milk was brought to me. I drank from it abundantly, until I saw freshness coming out from my fingernails. Then I gave the remainder (of the milk) to Umar bin Al-Khattab. The companions (may Allah be pleased with them) asked: What interpretation did you give to it? He (peace and blessings be upon him) said: Knowledge.