It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that he heard the Prophet (peace and blessings be upon him) say: Once, in a dream, a bowl of milk was brought to me. I drank so much of it that milk began to come out from my fingernails. Then I gave the remainder to Sayyiduna Umar (may Allah be pleased with him). Someone asked, "O Messenger of Allah! What interpretation did you give to this?" The Prophet (peace and blessings be upon him) said: Knowledge.